Akkouchi M, Bounabat A, Rhali ML. Fixed point approach to the stability of an integral equation in the sense of Ulam-Hyers-Rassias. Ann. Math. Sil. [Internet]. 2011 Sep. 30 [cited 2025 Dec. 7];25:27-44. Available from: https://journals.us.edu.pl/index.php/AMSIL/article/view/14019