Bombardelli, Mea, and Sanja Varošanec. “Strongly M_φM_ψ-Convex Functions, the Hermite-Hadamard-Fejér Inequality and Related Results”. Annales Mathematicae Silesianae 38, no. 2 (November 22, 2023): 195–213. Accessed July 1, 2025. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/15453.