AMSilR. (2018). Report of Meeting. The Eighteenth Debrecen–Katowice Winter Seminar on Functional Equations and Inequalities Hajdúszoboszló (Hungary), January 31–February 3, 2018. Annales Mathematicae Silesianae, 32, 333-349. Retrieved from https://journals.us.edu.pl/index.php/AMSIL/article/view/13931