Agarwal, P., T. Jabeen, V. Lupulescu, and D. O’Regan. “Existence of Global Solutions for Some classes of Integral Equations”. Ukrains’kyi Matematychnyi Zhurnal 70, no. 1 (January 25, 2018): 130-148. Accessed May 3, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1546.