YANG, A. An extension of Leggett-Williams norm-type theorem for coincidences and its application. Topological Methods in Nonlinear Analysis, [S. l.], v. 37, n. 1, p. 177–191, 2011. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2011.009. Acesso em: 26 apr. 2024.