AMSIL, Redakcja. Problem session. The 4th Czech and Polish Conference on Number Theory Cieszyn, June 11-14, 2002. Annales Mathematicae Silesianae, [S. l.], v. 16, p. 79–81, 2003. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14110. Acesso em: 1 jul. 2025.