CZAJA, Roman. Borys Paszkiewicz, Brakteaty – pieniądz średniowiecznych Prus. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders, [S. l.], v. 16, p. 333–334, 2011. DOI: 10.12775/NO_DOI_2011_10. Disponível em: https://apcz.umk.pl/OM/article/view/NO_DOI_2011_10. Acesso em: 2 jul. 2025.