Bombardelli, Mea, and Sanja Varošanec. “Strongly M_φM_ψ-Convex Functions, the Hermite-Hadamard-Fejér Inequality and Related Results”. Annales Mathematicae Silesianae, vol. 38, no. 2, Nov. 2023, pp. 195-13, https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/15453.