RICHTEREK, L. Celostátní kolo FO 2013. Matematika–Fyzika–Informatika, [S. l.], v. 22, n. 3, p. 230–234, 2013. Disponível em: http://158.194.80.143/index.php/mfi/article/view/49. Acesso em: 13 led. 2025.