OPREA, Anca Maria. Coincidence point and fixed point theorems for rational contractions. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 60, n. 1, p. 99–107, 2015. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5680. Acesso em: 5 feb. 2025.