MARTYNYUK, A. On the principle of comparison and estimates of the Lyapunov functions for nonlinear systems . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 9, p. 3–11, 2024. DOI: 10.15407/dopovidi2018.09.003. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/3002. Acesso em: 28 may. 2025.