PUZA, B.; RONTO, A. M.; RONTO, M. I.; SHCHOBAK, N. On solutions of nonlinear boundary-value problems the components of which vanish at certain points. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 1, p. 94–114, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1544. Acesso em: 5 dec. 2025.