GER, Roman; SIKORSKA, Justyna. On the Cauchy equation on spheres. Annales Mathematicae Silesianae, [S. l.], v. 11, p. 89–99, 1997. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14186. Acesso em: 26 apr. 2025.