Sosnitskii, S. P. (2009) “On one atypical scheme of application of the second Lyapunov method”, Ukrains’kyi Matematychnyi Zhurnal, 61(11), pp. 1557-1563. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3121 (Accessed: 19April2024).