Meeting R of. 20th International Conference on Functional Equations and Inequalities, Będlewo, Poland, September 17–23, 2023. Ann. Univ. Paedagog. Crac. Stud. Math. [Internet]. 2023 Dec. 8 [cited 2024 May 19];22:149-71. Available from: https://studmath.uken.krakow.pl/article/view/10623