Haddad, Wassim M.; Bernstein, Dennis S. Explicit construction of quadratic Lyapunov functions for the small gain, positivity, circle, and Popov theorems and their application to robust stability. Part II: Discrete-time theory. (English) Zbl 0806.93045 Int. J. Robust Nonlinear Control 4, No. 2, 249-265 (1994). MSC: 93D10 93C55 93D30 93D09 PDFBibTeX XMLCite \textit{W. M. Haddad} and \textit{D. S. Bernstein}, Int. J. Robust Nonlinear Control 4, No. 2, 249--265 (1994; Zbl 0806.93045) Full Text: DOI Link
Haddad, Wassim M.; Bernstein, Dennis S. Explicit construction of quadratic Lyapunov functions for the small gain, positivity, circle, and Popov theorems and their application to robust stability. I: Continuous-time theory. (English) Zbl 0794.93095 Int. J. Robust Nonlinear Control 3, No. 4, 313-339 (1993). MSC: 93D30 93D09 93D10 93C99 PDFBibTeX XMLCite \textit{W. M. Haddad} and \textit{D. S. Bernstein}, Int. J. Robust Nonlinear Control 3, No. 4, 313--339 (1993; Zbl 0794.93095) Full Text: DOI