Hezenci, Fatih, Hasan Kara, and Hüseyin Budak. “New Results on Bullen-Type Inequalities for Coordinated Convex Functions Obtained by Using Conformable Fractional Integrals”. Ukrains’kyi Matematychnyi Zhurnal 76, no. 11 (August 6, 2025): 1691–1712. Accessed December 15, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/7989.