MEL'NIK, T. A. Asymptotics of a solution of a discontinuous singularly perturbed Cauchy problem. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 11, p. 1502–1508, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5589. Acesso em: 5 dec. 2025.