NEBIYEV, C.; PANCAR, A. On strongly $\oplus$-supplemented modules. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 5, p. 662–667, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2751. Acesso em: 5 dec. 2025.