1. A characterization of integral input to state stability;Angeli;IEEE Trans. Automat. Control.,2000
2. D. Angeli, D. Liberzon, A note on uniform global asymptotic stability of nonlinear switched systems in triangular form, Proceedings of the 14th International Symposium on Mathematical Theory of Networks and Systems (MTNS), Perpignan, France, June 2000.
3. Methods of Dynamic and Nonsmooth Optimization;Clarke,1989
4. Nonsmooth Analysis and Control Theory;Clarke,1998
5. Controlled Markov Processes and Viscosity Solutions;Fleming,1993