ABDMOULEH, F.; BEN LAKHAL, T. Left and right B-fredholm operators. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 10, p. 1299–1307, 2022. DOI: 10.37863/umzh.v74i10.6331. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6331. Acesso em: 5 dec. 2025.