SEMENOV, P. V.; SHCHEPIN, E. V. Selection approach to multivalued separation theorems. Topological Methods in Nonlinear Analysis, [S. l.], v. 14, n. 1, p. 183–192, 1999. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.028. Acesso em: 22 jul. 2024.