LEISCHNER, P. Polibky kružnic: Jakob Steiner, 2. část. Matematika–Fyzika–Informatika, [S. l.], v. 26, n. 3, p. 161–166, 2017. Disponível em: http://158.194.80.143/index.php/mfi/article/view/335. Acesso em: 13 led. 2025.