On Hadamard Type Integral Inequalities for nonconvex Functions
  In this paper, we extend some estimates of the right and left hand side of a Hermite-Hadamard type inequality for nonconvex functions whose derivatives absolute values are \Phi-convex and quasi-\Phi-convex was introduced by Noor in Noor1. 
Mehmet Zeki Sarikaya, Hakan Bozkurt and Necmettin Alp
math.CA