eng Science and Education Publishing Turkish Journal of Analysis and Number Theory 2014-07-03 2 3 85 89 10.12691/tjant-2-3-6 TJANT2014236 article Mehmet Zeki Sarikaya sarikayamz@gmail.com 1 Samet Erden 2 Department of Mathematics, Faculty of Science and Arts, Düzce University, Konu-ralp Campus, Düzce-TURKEY Department of Mathematics, Faculty of Science, Bartn University, Konuralp Cam-pus, BARTIN-TURKEY In this paper, we extend some estimates of the right hand side of a Hermite- Hadamard-Fejér type inequality for functions whose first derivatives absolute values are convex. The results presented here would provide extensions of those given in earlier works. http://pubs.sciepub.com/tjant/2/3/6/tjant-2-3-6.pdf Ostrowski's inequality Montgomery's identities convex function H?lder inequality