MARTYNYUK, A.; CHERNIENKO, V. On the problem of stability of a motion of essentially nonlinear systems. Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 2, p. 3–12, 2021. DOI: 10.15407/dopovidi2021.02.003. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/2021-2-1. Acesso em: 16 mar. 2025.