Abbasоv A. Fredholm quasi-linear manifolds and degree of Fredholm quasi-linear mapping between them. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 5, p. 579–595, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2744. Acesso em: 17 apr. 2025.