Matkowski, Janusz, and Małgorzata Wróbel. “A Generalized A-Wright Convexity and Related Functional Equation”. Annales Mathematicae Silesianae 10 (September 30, 1996): 7-12. Accessed November 21, 2024. https://journals.us.edu.pl/index.php/AMSIL/article/view/14188.