“On the Connection Between Fixed Point Theorems on Metric Spaces With Graphs and $\mathbb{P}$ Sets”. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics 112 (December 5, 2025): 31–44. Accessed December 14, 2025. https://annual.uni-sofia.bg/index.php/fmi/article/view/1885.