SAMOILENKO , A. M.; SAMUSENKO , P. F. Asymptotic integration of singularly perturbed differential algebraic equations with turning points. Part I. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 12, p. 1669–1681, 2020. DOI: 10.37863/umzh.v72i12.6261. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6261. Acesso em: 14 apr. 2025.