Martynyuk-ChernienkoYu. A. “On the Theory of Stability of Motion of a Nonlinear System on a Time Scale”. Ukrains’kyi Matematychnyi Zhurnal 60, no. 6 (June 25, 2008): 776–782. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3195.