- Shengtao Li, Xiaomei Liu, Xiaoping Liu (2017). The coordinated immersion and variance control of power systems with excitation and steam-valve, Journal of Dynamical System, Measurement and Control
- Yang Liu, Xiaoping Liu, and Yuanwei Jing (2017). Adaptive backstepping H∞ tracking control with prescribed performance for internet congestion, ISA Transactions
- Zhao Zhang, Zhiliang Wang, Xuebo Chen, Xiaoping Liu (2017). Improved results on BIBO stability and stabilization of networked control systems with short time-varying delays, Journal of the Franklin Institute
- Bing Chen, Huaguang Zhang, Xiaoping Liu, and Chong Lin (2017). Neural observer and adaptive neural control design for a class of nonlinear systems, IEEE Transactions on Neural Networks and Learning Systems.
- Bing Chen, Huaguang Zhang, Xiaoping Liu, and Chong Lin (2017). Observer and adaptive fuzzy control design for nonlinear strict-feedback systems with unknown virtual control coefficients, IEEE Transactions on Fuzzy Set Systems.
- Ziye Zhang, Xiaoping Liu, Chong Lin, Bing Chen, Haixia Wang (2017). Finite-time stabilizability and instabilizability for complex-valued memristive neural networks with time delays, IEEE Transactions on Systems, Man and Cybernetics: Systems, Accepted
- Ziye Zhang, Xiaoping Liu, Runan Guo, Chong Lin (2017) Finite-time stability for delayed complex-valued BAM neural networks, Neural Processing Letters
- Ziye Zhang, Xiaoping Liu, Chong Lin, Shaowei Zhou (2017). Exponential stability analysis for delayed complex-valued memristor-based recurrent neural networks, Neural Computing and Applications
- Fang Wang, Bing Chen, Xiaoping Liu, and Chong Lin (2017). Finite-time adaptive fuzzy tracking control design for nonlinear systems, IEEE Transactions on Fuzzy Systems, accepted.
- Yinyan Zhang, Shuai Li, and Xiaoping Liu (2017). Adaptive near-optimal control of uncertain systems with application to underactuated surface vessels, IEEE Transactions on Control Systems Technology,
- ZhiguoYan, Weihai Zhang Ju H. Park, Xiaoping Liu (2017) Quantitative exponential stability and stabilization of discrete-time markov jump systems with multiplicative noises, IET Control Theory & Applications, 11(16), 2886-2892, Nov.
- Xiaohua Li and Xiaoping Liu (2017). Backstepping-based decentralized adaptive neural H_inf control for a class of large-scale nonlinear systems with expanding construction, Nonlinear Dynamics, 90(2), 1373-1392, Oct.
- Yonghui Yang, Wangbao Xu, Genxi Rong, Xiaoping Liu, and Xuebo Chen (2017). A self-organizing approach based on task-points for forming complex swarm-robot transport formations, Int. J. of Robotics and Automations, 32(5), 482-491, Oct.
- Zheng Wang, Xiaoping Liu, Kefu Liu, Shuai Li, and Huanqing Wang (2017). Backstepping-based Lyapunov function construction using approximate dynamic programming and sum of square techniques, IEEE Trans. Cybernetics, 47(10), 3393-3403, Oct.
- Runan Guo, Ziye Zhang, Xiaoping Liu, Chong Lin (2017). Existence, uniqueness, and exponential stability analysis for complex-valued memristor-based BAM neural networks with time delays, Applied Mathematics and Computation, 311, 110-117, Oct.
- Maoxiang Chu, Jie Zhao, Xiaoping Liu, Rongfen Gong (2017). Multi-class classification for steel surface defects based on machine learning with quantile hyper-spheres, Chemometrics and Intelligent Laboratory, 168, 15-27, Sept.
- Ziye Zhang, Xiaoping Liu, Jian Chen, Runan Guo, Shaowei Zhou (2017) Further stability analysis for delayed complex-valued recurrent neural networks, Neurocomputing, 251, 81-89, Aug.
- Xiaoping Liu, Chuang Gao, Ming Chen, Huanqing wang (2017). Adaptive fuzzy funnel control for a class of strict feedback nonlinear systems, Neurocomputing, 241(7), 71-80, June.
- Chuang Gao, Yufu Jia , Xiaoping Liu, Ming Chen (2017). Modeling and prescribed H∞ robust tracking control for strict feedback nonlinear systems, Nonlinear Analysis: Modelling and Control, 22(3), 317-333, March.
- Xiaohua Li, Xiaoping Liu, Bo Xu, Yang Liu, (2017). Adaptive neural network decentralized stabilization for nonlinear large scale interconnected systems with expanding construction, Journal of the Franklin Institute, 354(1), 233-256, Jan.
- Wangbao Xu, Genxi Rong, Xiaoping Liu, Tianyun Huang, and Xuebo Chen (2016). A method based on bottleneck-linear assignment for forming complex transport formations, International Journal of Advanced Robotic Systems, 13(1), the 6th paper, 1-10.
- Xiaoping Liu and Yufu Jia (2016). Linear quadratic regulator for impulse uncontrollable singular systems, Journal of Electrical & Electronic Systems, 5(4),1-5, DOI: 10.4172/2332-0796.1000207, Dec.
- Rongfen Gong, Chengdong Wu, Maoxiang Chu, Xiaoping Liu (2016). The strip Steel surface defect recognition based on multiple support vector hyper-sphere with feature and sample weights, Steel Research International, 87(12), 1678-1685, Dec.
- Min Wang, Cong Wang, Peng Shi, and Xiaoping Liu (2016). Dynamic learning from neural control for strict-feedback systems with guaranteed predefined performance, IEEE Trans. Neural Networks and Learning Systems, 27(12), 2564-2576, Dec.
- Wangbao Xu, Xiaoping Liu, Xuebo Chen, and Jie Zhao (2016). Improved artificial moment for decentralized local path planning of multi-robots, IEEE Trans. Control Systems Technology, 23(6), 2383-2390, Nov.
- Huanqing Wang, Xiaoping Liu, Kefu Liu (2016). Adaptive fuzzy tracking control for a class of pure-feedback stochastic nonlinear systems with non-lower triangular structure, Fuzzy Sets and Systems, 302(11), 101-120, Nov.
- Zhu Wang, Qibin Jin, Xiaoping Liu (2016) Iteratively reweighted correlation analysis method for robust parameter identification of multiple-input multiple-output discrete-time systems, IET Signal Processing, 10(5), 549-556, Jul.
- Huanqing Wang, Hongyan Liu, Xiaoping Liu, Liang Liu, Shuai Li (2016) Direct adaptive neural control of nonlinear strict-feedback systems with unmodeled dynamics using small-gain approach, International Journal of Adaptive Control and Signal Processing, 30(6), 906-927, Jun.
- Huanqing Wang, Xiaoping Liu, Peter Xiaoping Liu, Shuai Li (2016). Robust adaptive fuzzy fault-tolerant control for a class of non-lower-triangular nonlinear systems with actuator failures, Information Sciences, 336(1) 60-74, April.
- Huanqing Wang, Xiaoping Liu, Kefu Liu (2016). Robust adaptive neural tracking control for a class of stochastic nonlinear interconnection systems, IEEE Trans. Neural Networks and Learning Systems, 27(3), 510-523, Mar.
- Zhu Wang, Qibing Jin, Xiaoping Liu (2016). Recursive least squares identification of hybrid Box-Jenkins model structure in open-loop & closed-loop, Journal of the Franklin Institute, 353(2), 265-278, Jan.
- Bing Chen, Chong Lin, Xiaoping Liu, and Kefu Liu (2016). Observer-based adaptive fuzzy control for a class of nonlinear delayed systems, IEEE Trans. Systems, Man, and Cybernetics: Systems, 46(1), 27-36, Jan.
- Xiaohua Li, Xiaoping Liu, Yang Liu, and Jiawang Gao (2015). Organically structured control of large-scale systems with expanding construction based on state observation, Abstract and Applied Analysis, 2015(2015) Article ID 807202, 1-27.
- Xiaohua Li, Yang Liu, and Xiaoping Liu (2015). Decentralized finite-time connective control for a class of large-scale systems with different structural forms, Mathematical Problems in Engineering, 2015 (2015), Article ID 132517, 1-10.
- Bing Chen, Chong Lin, Xiaoping Liu and Kefu Liu (2015). Adaptive fuzzy tracking control for a class of MIMO nonlinear systems in non-strict-feedback form, IEEE Trans. Cybernetics, 25(12), 2774-2755, Dec.
- Qibing Jin, Zhu Wang and Xiaoping Liu (2015). Auxiliary model-based interval-varying multi-innovation least squares identification for multivariable OE-like systems with scarce measurements, Journal of Process Control, 35 (7) 154-168, Nov.
- Huanqing Wang, Kefu Liu, Xiaoping Liu, Bing Chen and Chong Lin (2015). Neural-based adaptive output-feedback control for a class of nonstrict-feedback stochastic nonlinear systems, IEEE Trans. Cybernetics, 45(9), 1977-1987, Sept.
- Huanqing Wang, Xiaoping Liu, Kefu Liu, Hamid Reza Karimi (2015). Approximation-based adaptive fuzzy tracking control for a class of non-strict-feedback stochastic nonlinear time-delay systems, IEEE Trans. Fuzzy Systems, 23(5), 1746-1760, Oct.
- Coppola, G., Liu, K., Liu, X., Zhang, D. (2015). Experimental study on the control of a novel vibration isolator via adaptive backstepping, Journal of Vibration and Control, 21(7), 1321-1339, May.
- Ming Chen, Xiaoping Liu, and Huanqing Wang (2015). Adaptive robust fault-tolerant control for nonlinear systems with predescribed performance, Nonlinear Dynamics, 81(4), 1727-1739, May.
- Huanqing Wang, Xiaoping Liu, Kefu Liu (2015). Adaptive neural data-based compensation control of nonlinear systems with dynamic uncertainties and input saturation, IET Control Theory & Applications, 9(7), 1058-1065, April.
- Huanqing Wang, Xuebo Yang, Zhandong Yu, Kefu Liu and Xiaoping Liu (2014). Fuzzy-approximation-based decentralized adaptive control for pure-feedback large-scale nonlinear systems with time-delay, Neural Computing and Applications, 26(1) 151-160, January.
- Ming Wang, Chong Wang, and Xiaoping Liu (2014). Dynamic learning from adaptive neural control with predefined performance for a class of nonlinear systems. Information Sciences, 279(2014), 874-888.
- Wangbao Xu, Xuebo Chen, Jie Zhao, and Xiaoping Liu (2014). Function-segment artificial moment method for sensor-based path planning of single robot in complex environments, Information Sciences, 280(1), 64-81.
- Bing Chen, Xiaoping Liu, Kefu Liu, and Chong Lin (2014). Fuzzy approximation-based adaptive control of nonlinear delayed systems with unknown dead zone, IEEE Trans. Fuzzy Systems, 22(2), 237-248.
- Bing Chen, Kefu Liu, Xiaoping Liu, Peng Shi, Chong Lin, and Huaguang Zhang (2014). Approximation-based adaptive neural control design for a class of nonlinear systems, IEEE Trans. Cybernetics, 44(5), 610-619.
- Huangqing Wang, Xiaoping Liu, Kefu Liu, Bing Chen, and Chong Lin (2014). Adaptive neural control for a general class of pure-feedback stochastic nonlinear systems, Journal of Neurocomputing, 135(5), 348-356.
- Huangqing Wang, Bing Chen, Xiaoping Liu, Kefu Liu, and Chong Lin (2014). Adaptive neural tracking control for stochastic nonlinear strict-feedback systems with unknown input saturation. Information Sciences, 269(5), 300-315.
- Huangqing Wang, Xiaoping Liu, Bing Chen, and Zhou Qi (2014). Adaptive fuzzy decentralized control for a class of pure-feedback large-scale nonlinear systems, Nonlinear Dynamics, 75(3), 449-460.
- Huangqing Wang, Bing Chen, Kefu Liu, Xiaoping Liu, and Chong Lin (2014). Adaptive neural tracking control for a class of non-strict feedback stochastic nonlinear systems with unknown backlash-like-hysteresis, IEEE Trans. Neural Networks and Learning Systems, 25(5), 947-958.
- Huangqing Wang, Xiaoping Liu, Zhou Qi, Hamid Reza Karimi (2014). Direct adaptive tracking control for a class of pure-feedback stochastic nonlinear systems based on fuzzy-approximation, Abstract and Applied Analysis, 2014(462468), 1-10.
- Yinhe Wang, Liang Luo, Yongqing Fan, Yun Zhang, Xiaoping Liu, and Siying Zhang (2014). Adaptive control design for a class of nonlinear systems based on fuzzy logic systems with scalars and saturators, Int. Journal of Systems Science, 45(3), 202-214.
- Huangqing Wang, Bing Chen, Xiaoping Liu, Kefu Liu, and Chong Lin (2013). Robust adaptive fuzzy tracking control for pure-feedback stochastic nonlinear systems with input constraints, IEEE Trans. Cybernetics, 43(6), 2093-2104.
- Bing Chen, Xiaoping Liu, Kefu Liu, Chong Lin (2013). Adaptive control for nonlinear MIMO time-delay systems based on fuzzy approximation. Information Sciences, 222, 576–592.
- Bing Chen, Xiaoping Liu, Kefu Liu, Chong Lin (2013). Adaptive fuzzy tracking control of nonlinear MIMO systems with time-varying delays, Fuzzy Sets and Systems, 217(4), 1–21.
- Shengtao Li, Xiaomei Liu, Xiujuan Dong, Yuanwei Jing, and Xiaoping Liu (2013). A novel controller for a class of nonlinear systems via immersion and invariance, Int. J. of Innovative Computing, Information and Control, 9(8), 3463-3470.
- Bing Chen, Xiaoping Liu, Shuzhi. Ge, and Chong Lin (2012). Adaptive fuzzy control of a class of nonlinear systems by fuzzy approximation approach, IEEE Trans. Fuzzy Systems, 20(6), 1012-1021.
- Min Wang, Xiaoping Liu, and Peng Shi (2011). Adaptive neural control of pure-feedback nonlinear time-delay systems via dynamic surface technique, IEEE Trans. Systems, Man, and Cybernetics, Part B, 41(6), 1681-1692.
- Bing Chen, Xiaoping Liu, Kefu Liu, and Chong Lin (2010). Fuzzy-approximation-based adaptive control of strict-feedback nonlinear systems with time delays, IEEE Trans. Fuzzy Systems, 18(5), 883-892.
- Bing Chen, Xiaoping Liu, Kefu Liu, Peng Shi (2010). Direct adaptive fuzzy control for nonlinear systems with time-varying delays, Information Sciences, 180(5), pp.776-792.
- Li Wang, Xiaoping Liu, and Kefu Liu (2009). Adaptive tracking control of parallel robots: backstepping and PD schemes, Int. Journal of Control Theory and Applications, 2(1), pp.39-59.
- Bing Chen, Xiaoping Liu, Kefu Liu, Chong Lin (2009). Novel adaptive neural control design for nonlinear MIMO time delay systems, Automatica, 45(6), pp.1554-1560.
- Xiaoheng Chang, Guanghong Yang, and Xiaoping Liu (2009), H-infinity fuzzy static output feedback control of T-S fuzzy systems based on fuzzy Lyapunov approach, Asian Journal of Control, 11(1), pp.89-93.
- Bing Chen, Xiaoping Liu, Kefu Liu, Chong Lin (2009). Direct adaptive fuzzy output tracking control of nonlinear strict-feedback systems”, Automatica, 45(6), pp. 1530-1535.
- Bing Chen, Xiaoping Liu (2009). Comment on adaptive fuzzy H_infinity stabilization for strict-feedback canonical nonlinear systems via backstepping and small-gain approach, IEEE Trans. Fuzzy Systems, 13 (3), pp.732–733.
- Ge Guo and Xiaoping Liu (2009). Observability and controllability of systems with limited data rate, Int. Journal of Systems Science, 40(4), pp.1464-5319.
- Li Wang, Zongtao Lu, Xiaoping Liu, Kefu Liu and Dan Zhang (2009). Adaptive control of a parallel robot via backstepping technique, International Journal of Systems, Control and Communications, 1(3), pp.312-324.
- Yongqiang Ye, Abdelhamid Tayebi, Xiaoping Liu (2009). All-pass filtering in iterative learning control, Automatica, 45(1), pp.257-264.
- Bing Chen, Xiaoping Liu, Chong Lin and Kefu Liu. (2009). Robust H_infinity control of Takagi-Sugeno fuzzy systems with state and input time-delays. Fuzzy Sets and Systems, 160(4), pp.403-422.
- Min Wang, Bing Chen, Kefu Liu, Xiaoping Liu and Siying Zhang (2008). Adaptive fuzzy tracking control of nonlinear time-delay systems with unknown virtual control coefficients, Information Sciences, 178(22), pp.4326-4340.
- Bing Chen, Xiaoping Liu, Shaocheng Tong and Chong Lin (2008). Observer-based Stabilization of T-S fuzzy systems with input delay, IEEE Trans. Fuzzy Systems, 16 (3), pp.652–663.
- Xiaoping Liu (2008) A global canonical form for nonlinear singular control systems, Int. Journal of Systems, Control and Communications, 1(1), pp.82-97.
- Bing Chen, Chong Lin, Xiaoping Liu, and Shaocheng Tong (2008). Guaranteed cost control of T-S fuzzy Systems with input delay, Int. Journal of Robust and Nonlinear Control, 18(12), pp.1230-1256.
- Min Wang, Bing Chen, Xiaoping Liu and Peng Shi (2008). Adaptive fuzzy tracking control for a class of perturbed strict-feedback nonlinear time-delay systems, Fuzzy Sets and Systems, 159(8), 949-967.
- Bing Chen, Xiaoping Liu, and Shaocheng Tong (2008). Robust fuzzy control of nonlinear systems with input delay. Chaos, Solitons & Fractals, 37 (3), pp.894–901.
- Bing Chen, Xiaoping Liu, and Shaocheng Tong (2007). Guaranteed cost control of time-delay chaotic systems via memoryless state feedback. Chaos, Solitons & Fractals, 34(5), pp.1683-1688.
- Bing Chen, Xiaoping Liu, Shaocheng Tong, and Chong Lin (2007). Guaranteed cost control of T-S fuzzy systems with state and input delays. Fuzzy Sets and Systems, 158(20), 2251-2267.
- Bing Chen, Xiaoping Liu, and Shaocheng Tong (2007). New delay-dependent stabilization conditions of T-S fuzzy systems with constant delay. Fuzzy Sets and Systems, 158(20), 2209-2224.
- Bing Chen, Xiaoping Liu, and Shaocheng Tong (2007). Adaptive fuzzy approach to control unified chaotic systems, Chaos, Solitons & Fractals, 34(4), pp.1180-1187.
- Bing Chen, Shaocheng Tong, and Xiaoping Liu (2007). Fuzzy approximate disturbance decoupling of MIMO nonlinear systems by backstepping approach. Fuzzy Sets and Systems, 158(10), 1097-1125.
- Bing Chen, Xiaoping Liu, and Shaocheng Tong (2007). Adaptive fuzzy output tracking control of MIMO nonlinear uncertain systems, IEEE Trans. Fuzzy Systems, 15(2), 287-300.
- Xiaoheng Chang, Yuanwei Jing, Xiying Gao, Xiaoping Liu (2007). Stability analysis and fuzzy controller design for TS fuzzy control system. Journal of of System Simulation, 19(24), 5624-5627.
- Georgi M. Dimirovski, Yuanwei Jing, Wenlei Li, and Xiaoping Liu (2006). Adaptive back-stepping design of TCSC robust nonlinear control for power systems, Autosoft Intelligient Automation & Soft Computing, 12(1).
- Bing Chen, Xiaoping Liu, and Shaocheng Tong (2006). Delay-dependent stability analysis and control synthesis of fuzzy dynamic systems with time-delay, Fuzzy Sets and Systems, 157(16), 2224-2240.
- Bing Chen and Xiaoping Liu (2005). Fuzzy approximate disturbance decoupling of MIMO nonlinear systems by backstepping and application to chemical processes, IEEE Trans. Fuzzy Systems, 13(6), 832-847.
- Bing Chen and Xiaoping Liu (2005). Delay-dependent robust H-infinity control for T-S fuzzy systems with time delay, IEEE Trans. Fuzzy Systems, 13(4), 544-556.
- Bing Chen and Xiaoping Liu (2005), Fuzzy guaranteed cost control of nonlinear neutral delay systems with parameter uncertainty, Dynamics of Continuous, Discrete and Impulsive Systems Series B: Applications & Algorithms 12b (2005) 381-396.
- Bing Chen and Xiaoping Liu (2005). Fuzzy guaranteed cost control for nonlinear systems with time-varying delay, IEEE Trans. Fuzzy Systems, 13(2), 238-249.
- Xiaoping Liu, Daniel W.C. Ho, and Xiaohua Wang (2004). Input-output block decoupling of affine nonlinear singular systems, Dynamics of Continuous, Discrete and Impulsive Systems, Series A: Mathematical Analysis, 11(5-6), 771-786.
- Xiaoping Liu, Daniel W.C. Ho (2004). Stabilization of nonlinear differential- algebraic equation systems, Int. Journal of Control, 77(7), 671-684.
- Bing Chen and Xiaoping Liu (2004). Reliable control design of fuzzy dynamic systems with time-varying delay, Fuzzy Sets and Systems, 146(3), 349-374.
- Xiaoping Liu, A. Jutan, and S. Rohani (2004). Almost disturbance decoupling of MIMO nonlinear systems and application to chemical processes, Automatica, 40(5), 465-471.
- Xiaoping Liu, S. Rohani, and A. Jutan (2003). Tracking control of general nonlinear differential-algebraic equation systems, AIChE Journal, 49(7), 1743-1760.
- Guangwei Li, Chuanzhi Zang, and Xiaoping Liu (2003). Comment on “Robust stabilization of a class of time-delay nonlinear systems”. IEEE Trans. Auto. Control, 48(5), 908-908.
- Xiaoping Liu and Daniel W.C. Ho (2002). Disturbance decoupling of linear time-varying singular systems. IEEE Trans. Auto. Control, 47(2), 335-341.
- Xiaoping Liu and Gongsheng Huang (2001). Global decentralized robust stabilization for interconnected uncertain nonlinear systems with multiple inputs. Automatica, 37(9), 1435-1442.
- Xiaoping Liu, Xiaohua Wang, and Daniel W.C. Ho (2000). Input-output block decoupling of linear time-varying singular systems, IEEE Trans. Auto. Control, 45(2), 312-318.
- Xiaoping Liu, Guoxiang Gu, and Kemin Zhou (1999). Robust stabilization of MIMO nonlinear systems by backstepping. Automatica, 35(5), 987-992.
- Xiaoping Liu, Kemin Zhou, and Guoxiang Zhou (1999). Global stabilization of MIMO minimum-phase nonlinear systems without strict triangular conditions. Systems & Control Letters, 36(4), 359-362.
- Xiaoping Liu (1999). Input-output decoupling of linear time-varying singular systems. IEEE Trans. Auto. Control, 44(5), 1016-1021.
- Xiaoping Liu (1998). Local disturbance decoupling of nonlinear singular systems. Int. J. of Control, 70(7), 685-702.
- Xiaoping Liu (1998). Asymptotic output tracking of nonlinear differential- algebraic control systems. Automatica, 34(3), 393-397.
- Xiaoping Liu and S. Celikovsky (1997). Feedback control of affine nonlinear singular control systems. Int. J. of Control, 68(4), 753-774.
- Xiaoping Liu and V. Kucera (1997). Strong decoupling of descriptor systems via proportional state feedback. Kybernetika, 33(4), 371-386.
- Xiaoping Liu (1993). Optimal control problems for large-scale composite systems with similarity. Control–Theory and Advanced Technology, 9(2), 597-606.
- Xiaoping Liu and Siying Zhang (1992). Optimal incentive strategy for leader-follower games. IEEE Trans. Auto. Control, 37(12), 1957-1961.
- Xiaoping Liu (1992). Output regulation of strongly coupled symmetric composite systems. Automatica, 28(5), 1037-1041.
- Xiaoping Liu, Jingcai Wang, and Siying Zhang (1992). The canonical form of uncontrollable nonlinear control systems. Science in China, Series A, 35(7), 889-896.
- Xiaoping Liu and Siying Zhang (1992). Comments on stabilization of interconnected uncertain discrete systems via decentralized control. Information and Decision Tech., 18(3), 221-222.
- Xiaoxin Xie, Xiaoping Liu and Siying Zhang (1991). The Kalman decomposition of nonlinear control systems possessing symmetry, Advance in Modelling & Simulation, 27(4), 57-63.
- Xiaoping Liu and Siying Zhang (1991). Three-level Stackelberg strategies in linear-quadratic descriptor systems. Control and Cybernetics, 20(3), 73-83.
- Xiaoping Liu and Siying Zhang (1991). Three-level Stackelberg strategies in linear-quadratic singular systems. Informatica, 2(3), 414-433.
- Xiaoping Liu and Siying Zhang (1991). Stackelberg strategies for singular dynamic systems. Informatica, 2(2), 233-247.
- Xiaoping Liu and Siying Zhang (1989). Optimal control problem for linear time-varying descriptor systems. Int. J. of Control, 49(5), 1441-1452.