IVOCHKINA, Nina. The existence of evolution of closed type. Topological Methods in Nonlinear Analysis, [S. l.], v. 9, n. 2, p. 233–247, 1997. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1997.011. Acesso em: 9 jul. 2025.