“…Recently, Tunç and Göv [42][43][44] studied the concept of (p, q)-calculus over the intervals [a, b] and gave some new definitions of (p, q)-derivatives and (p, q)-integrals. Moreover, they also derived some of its properties and many integral inequalities as in (1), which is called (p, q)-Hermite-Hadamard inequality, and some new results on (p, q)-calculus of several important integral inequalities. Next, Mehmet Kunt et al [45] proved the left side of the (p, q)-Hermite-Hadamard inequality through (p, q)-differentiable convex and quasiconvex functions, and then, they had some new (p, q)-Hermite-Hadamard inequalities.…”