CHOUDHURY, B. S.; KUNDU, A. FIXED POINT THEOREMS FOR NONLINEAR CONTRACTIONS IN ORDERED PARTIAL METRIC SPACES. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), [S. l.], v. 4, n. 1, p. 147–158, 2012. Disponível em: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2696. Acesso em: 2 sep. 2026.