Rifaat Saad Abdul-Jabbar. "On Fixed Point Theorem in Complete Quasi-Metric Space under F-Contraction Mapping". Tikrit Journal of Pure Science 24, no. 2 (أبريل 15, 2019): 88–90. تاريخ الوصول مايو 18, 2024. https://tjps.tu.edu.iq/index.php/tjps/article/view/358.