PANCAR, A.; TÜRKMEN, B. N. Generalizations of $\oplus$-supplemented modules. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 65, n. 4, p. 555–564, 2013. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2439. Acesso em: 5 dec. 2025.