GUPTA, Neelmani. Common Fixed Point Theorems Of Gregus Type For Compatible Mappings In Banach Spaces. International Journal of Psychosocial Rehabilitation, [S. l.], v. 13, n. No. 1, p. 140–146, 2009. DOI: 10.61841/v7rcv677. Disponível em: https://psychosocial.com/index.php/ijpr/article/view/3378. Acesso em: 2 jul. 2025.