TÖPFER, P. Mezinárodní olympiáda v informatice – IOI 2013. Matematika–Fyzika–Informatika, [S. l.], v. 22, n. 5, p. 391–392, 2013. Disponível em: http://158.194.80.143/index.php/mfi/article/view/96. Acesso em: 13 led. 2025.