QiF., XiB.-Y., & ZhangT.-Y. (2015). Hermite–Hadamard-Type Integral Inequalities for Functions Whose First Derivatives are Convex. Ukrains’kyi Matematychnyi Zhurnal, 67(4), 555-567. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2002