MEL'NIK, T. A. Decomposition of systems of quasidifferential equations with rapid and slow variables. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 3, p. 413–417, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4625. Acesso em: 5 dec. 2025.