KARAMI, A.; SHAKERI, R.; SEDGHI, S.; Altun І. Coupled fixed point results on metric spaces defined by binary operations. Carpathian Mathematical Publications, [S. l.], v. 10, n. 2, p. 313–323, 2018. DOI: 10.15330/cmp.10.2.313-323. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/1491. Acesso em: 25 apr. 2024.