1. [1] T. Antczak, Mean value in invexity analysis, Nonl. Anal. 60(2005), 1473-1484.
2. [2] A. Barani, A.G. Ghazanfari, S.S. Dragomir, Hermite-Hadamard inequality through prequasiinvex functions, RGMIA Research Report Collection,14(2011), Article 48, 7 pp.
3. [3] A. Barani, A.G. Ghazanfari, S.S. Dragomir, Hermite-Hadamard inequality for functions whose derivatives absolute values are preinvex, J. Inequal.Appl. 2012, 2012:247.
4. [4] S.S. Dragomir and C.E.M. Pearce, Selected Topics on Hermite-Hadamard Inequalities and Applications, RGMIA Monographs, Victoria University,2000.
5. [5] J. Hadamard, E´tude sur les proprie´te´s des fonctions entie`res et en particulier d’une fonction considere´e par Riemann, J. Math Pures Appl., 58 (1893),171–215.