PLOEGER, Jan. De vesting Doesburgh - van landweer tot vestingwal. Scientia Militaria - South African Journal of Military Studies, [S. l.], v. 5, n. 4, 2011. DOI: 10.5787/5-4-877. Disponível em: https://ngtt.journals.ac.za/index.php/pub/article/view/877. Acesso em: 12 jun. 2026.