[1] B.C. Arnold, A.W. Marshal and I. Olkin, Inequalities : Theory of Majorization and It’s Applications, Springer Series in Statistics, New York-Dordrecht-Heidelberg-London, 2011.
[2] R.G. Bartel, The Elements of Real Analysis, Jon Wiley and Sons, 2st edition, 1976.
[3] Y. Chu, G. Wang, and X. Zhang, Schur convexity and Hadamard’s inequality. Mathematical Inequalities and Applications, 13 (4): 725-731, 2010.
[4] V. Culjak, I. Franjic, R. Ghulam, and J. Peˇcari´c, Schur-Convexity of averages of convex functions. Journal of Inequalities and Applications, 25 pages, Article ID 581918, 2011.
[5] S.S. Dragomir, On the Hadamard’s inequality for convex functions on the co-ordinates in a rectangle from the plan. Taiwanese Journal of Mathematics, 5: 775-778, 2001.
[6] N. Elezovi´c and J. Peˇcari´c, A note on Schur-convex functions. Rocky mountain Journal of Mathematics, 30 (3): 853-856, 2000.
[7] M.E. Ozdemir and A.O. Akdemir, On some Hadamard-type inequalities for convex functions on a rectangular box. Journal of Nonlinear Analysis and Application ,Volume 2011 (2011), Article ID jnaa-00101,10 Pages doi: 10.5899/2011/jnaa-00101.
[8] A.W. Roberts and D.E. Varberg, Convex functions, Academic Press, New York, 1973.
[9] H.-N. Shi, Schur-convex functions related to Hadamard-type inequalities. Journal of Mathematical Inequalities, 1 (1): 127-136, 2007.
[10] X. Zhang and Y. Chu, Convexity of the integral arithmetic mean of a convex function. Rocky mountain Journal of Mathematics, 40 (3): 1061-1068, 2010.