KOROL', I. I.; PERESTYUK, N. A. Once again on the Samoilenko numerical-analytic method of successive periodic approximations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 4, p. 472–488, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3468. Acesso em: 6 dec. 2025.