BOLOTOV, D. On foliations of spheres . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 8, p. 7–13, 2025. DOI: 10.15407/dopovidi2014.08.007. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/16603. Acesso em: 18 jun. 2025.