VAN ROOYEN, Petrus Hendrik. The German attack on the Witboois at Hornkranz, Namibia, April 1893. Scientia Militaria - South African Journal of Military Studies, [S. l.], v. 49, n. 1, p. 57–73, 2021. DOI: 10.5787/49-1-1249. Disponível em: https://www.journals.ac.za/index.php/pub/article/view/1249. Acesso em: 11 jun. 2026.