DHAGE, B. C. . Multi-valued mappings and fixed points II. Tamkang Journal of Mathematics, [S. l.], v. 37, n. 1, p. 27-46, 2006. DOI: 10.5556/j.tkjm.37.2006.177. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/177. Acesso em: 19 sep. 2021.