AMSil, Redakcja. “Report of Meeting. The Eighteenth Debrecen–Katowice Winter Seminar on Functional Equations and Inequalities Hajdúszoboszló (Hungary), January 31–February 3, 2018”. Annales Mathematicae Silesianae, vol. 32, May 2018, pp. 333-49, https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/13931.