NIKITINA, N. V. About Lyapunov characteristic indices . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 8, p. 64–71, 2025. DOI: 10.15407/dopovidi2015.08.064. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/15145. Acesso em: 19 apr. 2026.