AissiY., ZeglamiD. and AyoubiM. (2020) “A variant of d’Alembert’s matrix functional equation”, Annales Mathematicae Silesianae, 35(1), pp. 21-43. Available at: https://www.journals.us.edu.pl/index.php/AMSIL/article/view/13472 (Accessed: 19May2024).