GAIROLA, U. C.; KRISHAN, R. Coincidence and Fixed Point Theorems for Multivalued and Singlevalued Mappings. The Journal of the Indian Mathematical Society, [S. l.], v. 82, n. 3-4, p. 65–82, 2015. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/1683. Acesso em: 7 may. 2024.