[1] S. S. DRAGOMIR AND C. E. M. PEARCE,Select Topics on Hermite-Hadamard Inequalities, (RGMIA Monographs http://rgmia.vu.eduau/monographs/hermite-hadamard.html) Victoria University, 2000
[2] A. EL FARISSI, Z. LATREUCH, B. BELAIDI, Hadamard –Type Inequalities for Twice Differentiable Function, RGMIA research report collection , 12, 1(2009), Art. 6.