ZHURAVLEV, V. F. Bifurcation conditions for the solutions of weakly perturbed boundary-value problems for operator equations in Banach spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 3, p. 366–378, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1562. Acesso em: 5 dec. 2025.