CALÁBEK, P. Central Round of the 75th Mathematical Olympiad, Category A. MATHEMATICS–PHYSICS–INFORMATICS, [S. l.], v. 35, n. 2, p. 156–157, 2026. Disponível em: https://mfi.upol.cz/index.php/mfi/article/view/1118. Acesso em: 15 nov. 2026.