ALBRECHT U. ℵ1-A-coseperable groups. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2015 Dec. 30 [cited 2025 Feb. 5];60(4):493-507. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5819