1. Bekar, K., Hermite-Hadamard Type Inequalities for Trigonometrically P-functions. Comptes rendus de l’Académie bulgare des Sciences, 72(11) (2019).
2. Bombardelli, M. and Varošanec, S., Properties of h-convex functions related to the Hermite-Hadamard-Fejér inequalities, Comput. Math. Appl., 58 (2009) 1869-1877.
3. Dragomir, S.S., and Pearce, C.E.M., Selected Topics on Hermite-Hadamard Inequalities and Its Applications, RGMIA Monograph 2002.
4. Dragomir, S.S., Pečarić, J. and Persson, L.E., Some inequalities of Hadamard Type, Soochow Journal of Mathematics, 21 (3)(2001), pp. 335-341.
5. Hadamard, J., Étude sur les propriétés des fonctions entières en particulier d’une fonction considérée par Riemann, J. Math. Pures Appl. 58(1893), 171-215.