RAVIBABU, K.; RAO, Ch. Srinivasa; NAIDU, Ch. Raghavendra. COUPLED FIXED AND COINCIDENCE POINT THEOREMS FOR GENERALIZED CONTRACTIONS IN METRIC SPACES WITH A PARTIAL ORDER: coupled fixed point. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 39, p. 434–450, 2018. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6902. Acesso em: 26 sep. 2026.