OF MEETING, R. 14th International Conference on Functional Equations and Inequalities, Będlewo, September 11–17, 2011. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 10, p. 117–150, 2011. Disponível em: https://studmath.uken.krakow.pl/article/view/13222. Acesso em: 29 oct. 2026.