PLOTKIN, Ya. D.; TURBIN, A. F. Asymptotic integration of a singularly perturbed quasilinear cauchy problem in a banach space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 8, p. 1077–1086, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4698. Acesso em: 5 dec. 2025.