BABENKO, V. I. On the lower bound of the Gauss curvature of a strictly convex closed surface . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 3, p. 7–10, 2025. DOI: 10.15407/dopovidi2015.03.007. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/14038. Acesso em: 13 may. 2025.