STRZYŻ, P.; CZUBLA, P.; MACKIEWICZ, A. Cannonballs from the Olsztyn turret. Fasciculi Archaeologiae Historicae, [S. l.], v. 28, p. 123–132, 2015. Disponível em: https://journals.iaepan.pl/fah/article/view/1490. Acesso em: 26 apr. 2024.