[1] A. Barani, A.G. Ghazanfari and S.S. Dragomir, Hermite-Hadamard inequality for functions whose derivatives absolute values are preinvex, J. Inequal. Appl. 2012(1) (2012) 247.
[2] A. Ben-Israel and B. Mond, What is invexity?, J. Aust. Math. Soc. Series B. Appl. Math. 28(1) (1986) 1–9.
[3] S.S. Dragomir and C.E.M. Pearce, Selected Topics on Hermite-Hadamard Inequalities and Applications, Victoria University, Australia, 2000.
[4] M. A. Hanson, On sufficiency of the Kuhn-Tucker conditions, J. Math. Anal. Appl. 80(2) (1981) 545–550.
[5] I. I¸scan, Hermite-Hadamard’s inequalities for preinvex functions via fractional integrals and related fractional inequalities, arXiv:1204.0272 (2012).
[6] A.A. Kilbas, H.M. Srivastava and J.J. Trujillo, Theory and Applications of Fractional Differential Equations, Elsevier Science Limited, 2006.
[7] K. Liu, J. Wang and D. O’Regan, On the Hermite-Hadamard type inequality for ψ-Riemann-Liouville fractional integrals via convex functions, J. Inequal. Appl. 2019(1) (2019) 27.
[8] S.K. Mishra and N. Sharma, On strongly generalized convex functions of higher order, Math. Inequal. Appl. 22(1) (2019) 111–121.
[9] D.S. Mitrinovi´c and I.B. Lackovi´c, Hermite and convexity, Aequ. Math. 28(3) (1985) 229–232.
[10] S.R. Mohan and S.K. Neogy, On invex sets and preinvex functions, J. Math. Anal. Appl. 189 (1995) 901–908.
[11] M.A. Noor, Hadamard integral inequalities for product of two preinvex functions, Nonl. A. Forum 14 (2009) 167–173.
[12] M.A. Noor, Hermite-Hadamard integral inequalities for log-preinvex functions, J. Math. Anal. Approx. Theory 2(2) (2007) 126–131.
[13] M.A. Noor, On Hadamard integral inequalities involving two log-preinvex functions, J. Inequal. Pure. Appl. Math. 8(3) (2007) 1–14.
[14] R. Pini, Invexity and generalized convexity, Optim. 22(4) (1991) 513–525.
[15] J. Wang and M. Feˇckan, Fractional Hermite-Hadamard Inequalities, De Gruyter, Berlin, 2018.
[16] T. Weir and B. Mond, Preinvex functions in multiple objective optimization, J. Math. Anal. Appl. 136 (1998) 29–38.