HUDYMA, U. V. Best uniform approximation of a continuous compact-valued mapping by sets of continuous single-valued mappings. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 12, p. 1601–1618, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3712. Acesso em: 5 dec. 2025.