Páles, Zsolt. “An Elementary Proof for the Decomposition Theorem of Wright Convex Functions”. Annales Mathematicae Silesianae 34, no. 1 (July 9, 2020): 142-150. Accessed May 16, 2024. https://www.journals.us.edu.pl/index.php/AMSIL/article/view/13639.