AMSil, R. (2005). Report of Meeting. The Fifth Katowice-Debrecen Winter Seminar On Functional Equations and Inequalities February 2-5, 2005, Będlewo, Poland. Annales Mathematicae Silesianae, 19, 65–78. Retrieved from https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14087