AKDAĞ, Metin; EROL, Fethullah. Upper and Lower ?-Continuity of Soft Multifunctions. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 8, n. 1, p. 96–107, 2014. Disponível em: https://asrjetsjournal.org/American_Scientific_Journal/article/view/756. Acesso em: 11 sep. 2025.