New Inequalities of Fej´er and Hermite-Hadamard type Concerning Convex and Quasi- Convex Functions With Applications. Punjab Univ. J. Math. [Internet]. 2025 May 13 [cited 2025 Jun. 29];53(2):1-17. Available from: https://pujm.pu.edu.pk/index.php/pujm/article/view/254