KUDŁACIK, Przemysław; SIKORA, Agnieszka. Cryptocurrencies — Virtual Gold. No Limits, [S. l.], n. 2(8), p. 16–17, 2023. Disponível em: https://journals.us.edu.pl/index.php/no_limits/article/view/16257. Acesso em: 5 dec. 2025.