ChenF. X. 2018. “On the Generalization of Some Hermite – Hadamard Inequalities for Functions With Convex Absolute Values of the Second Derivatives via Fractional Integrals”. Ukrains’kyi Matematychnyi Zhurnal 70 (12), 1696-1706. http://umj.imath.kiev.ua/index.php/umj/article/view/1668.