APREUTESEI, Narcisia C.; VOLPERT, Vitaly A. Some properties of infinite dimensional discrete operators. Topological Methods in Nonlinear Analysis, [S. l.], v. 24, n. 1, p. 159–181, 2004. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2004.023. Acesso em: 5 sep. 2026.