@article{SPM355, author = "Christopher M. Kellett and Andrew R. Teel", title = "On the Robustness of KL-stability for Difference Inclusions: Smooth Discrete-Time Lyapunov Functions", journal = "SIAM Journal on Control and Optimization", year = 2005, volume = 44, number = 3, pages = "777-800", month = "jan" }