ŠTEFL, V. Zajímavé úlohy z historie astronomie. Matematika–Fyzika–Informatika, [S. l.], v. 22, n. 3, p. 197–210, 2013. Disponível em: http://158.194.80.143/index.php/mfi/article/view/45. Acesso em: 13 led. 2025.