BLAŽEK, J.; LEISCHNER, P. Kuželosečky a Apolloniovy kružnice. Matematika–Fyzika–Informatika, [S. l.], v. 28, n. 3, p. 175–185, 2019. Disponível em: http://158.194.80.143/index.php/mfi/article/view/456. Acesso em: 13 led. 2025.