Fechner, Włodzimierz, Marta Pierzchałka, and Gabriela Smejda. “On a Generalized Conjecture by Alzer and Matkowski”. Annales Mathematicae Silesianae (April 27, 2025). Accessed December 5, 2025. https://journals.us.edu.pl/index.php/AMSIL/article/view/18828.