DYMARSKII, Ya. M. On branches of small solutions of certain operator equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 7, p. 901–909, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5262. Acesso em: 27 apr. 2025.