PELEKH , Ya. M. One approach to the determination of approximate solutions of the Cauchy problem for nonlinear differential equations . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 12, p. 1695–1701, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8194. Acesso em: 27 apr. 2025.