Pöhlmann, Markus (10 March 2016). Daniel, Ute; Gatrell, Peter; Janz, Oliver; Jones, Heather; Keene, Jennifer; Kramer, Alan; Nasson, Bill (eds.). "Prussian War Ministry". 1914–1918-online. International Encyclopedia of the First World War. Freie Universität Berlin. Retrieved 2 July 2024.