Popa, Valeriu, and PatriciuAlina-Mihaela. “Altering Distance and Common Fixed Points for Hybrid Mappings under Implicit Relations and Applications”. Annales Mathematicae Silesianae 28 (September 30, 2014): 87-96. Accessed November 24, 2024. https://journals.us.edu.pl/index.php/AMSIL/article/view/13994.