Dixon M, Kurdachenko L, Pypka A. On some analogues of theorems of Schur and Baer . Dopov. Nac. akad. nauk Ukr. [Internet]. 2014 Oct. 28 [cited 2026 Aug. 1];(10):21-3. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/16774