Types of Fixed Points of Set-Valued Contraction Mappings for Comparable Elements. Iraqi Journal of Science, [S. l.], p. 190–195, 2020. DOI: 10.24996/ijs.2020.SI.1.25. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2245.. Acesso em: 19 dec. 2024.