Chabanyuk, Ya. M. “Stability of a Dynamical System With Semi-Markov Switchings under Conditions of Diffusion Approximation”. Ukrains’kyi Matematychnyi Zhurnal 59, no. 9 (September 25, 2007): 1290–1296. Accessed April 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3388.