LAKUSTA, L. M.; PETRYSHYN, R. I.; SAMOILENKO, A. M. Error Estimates for the Averaging Method for Pulse Oscillation Systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 4, p. 510–524, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3924. Acesso em: 14 apr. 2025.