MIRMOSTAFAEE, A. K. Points of upper and lower semicontinuity of multivalued functions .................. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 9, p. 1224–1231, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1772. Acesso em: 27 apr. 2025.