LIN, Chin-Yuan. Cauchy problems and applications. Topological Methods in Nonlinear Analysis, [S. l.], v. 15, n. 2, p. 359–368, 2000. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2000.024. Acesso em: 8 jul. 2025.