PELYUKH, G. P. On the existence and uniqueness of solutions continuous and bounded on the real axis for nonlinear functional equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 3, p. 416–418, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4432. Acesso em: 17 apr. 2025.