Hiden, John, 1940-. Defender of minorities: Paul Schiemann, 1876 - 1944. - London : Hurst. - 2004 [Rezension] - Brüggemann, Karsten (. Reviews in history. - London : Inst. of Historical Research, 1996-. - Online-Ressource. - ISSN 1749-8155, 2005)