1. [1] F. Angulo, E. Fossas, and G. Olivar, “Transition from periodicity to chaos in a PWM-controlled buck converter with ZAD strategy,” Int. J. Bifurcation and Chaos, vol. 15, no. 1, pp. 3245-3264, 2015.
2. [2] V.M. Kuntsevich and Y.N. Chekhovoi, “Fundamentals of non-linear control systems with pulse-frequency and pulse-width modulation,” Automatica, vol. 7, no. 1, pp. 73-81, 1971.
3. [3] L. Hou and A.N. Michel, “Stability analysis of pulse-width-modulated feedback systems,” Automatica, vol. 37, no. 9, pp. 1335-1349, 2001.
4. [4] S. Almér, U. Jönsson, C.Y. Kao, and J. Mari, “Stability analysis of a class of PWM systems,” IEEE Trans. Autom. Control, vol. 52, no. 6, pp. 1072-1078, 2007.
5. [5] H. Fujioka, C.Y. Kao, S. Almér, and U. Jönsson, “Robust tracking with H∞ performance for PWM systems,” Automatica, vol. 45, no. 8, pp. 1808-1818, 2009.