Meeting R of. 21st International Conference on Functional Equations and Inequalities, Będlewo, Poland, September 14–20, 2025. Ann. Univ. Paedagog. Crac. Stud. Math. [Internet]. 2026 Mar. 5 [cited 2026 Mar. 13];25:107-31. Available from: https://studmath.uken.krakow.pl/article/view/12751