BADORA, Roman; PRZEBIERACZ, Barbara; VOLKMANN, Peter. Stability of the Pexider functional equation. Annales Mathematicae Silesianae, [S. l.], v. 24, p. 7–13, 2010. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14030. Acesso em: 18 apr. 2025.