DIXON, M.; KURDACHENKO, L.; PYPKA, A. On some analogues of theorems of Schur and Baer . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 10, p. 21–23, 2025. DOI: 10.15407/dopovidi2014.10.021. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/16774. Acesso em: 30 may. 2026.