Common fixed point of two pairs of weakly compatible mapping using rational type contraction in $C^*$-algebra valued metric space. Nonlinear Studies, [S. l.], v. 30, n. 1, 2023. Disponível em: https://nonlinearstudies.com/index.php/nonlinear/article/view/2872. Acesso em: 11 oct. 2025.