AMSilR. (2003). Report of Meeting. The Third Katowice-Debrecen Winter Seminar on Functional Equations and Inequalities January 29 - February 1, 2003, Będlewo, Poland. Annales Mathematicae Silesianae, 17, 67-84. Retrieved from https://journals.us.edu.pl/index.php/AMSIL/article/view/14102