Göllnitz, Martin (2021). "Homophobie und Revolutionsangst. Die politische Dramaturgie des 30. Juni 1934" [Homophobia and fear of revolution. The political dramaturgy of June 30, 1934]. Revolution in Kiel – Revolutionsangst in der Geschichte [Revolution in Kiel – fear of revolution in history] (PDF). Kieler Schriften zur Regionalgeschichte: Band 8 (in German). Wachholtz Verlag [de]. pp. 209–234.
Schwartz, Michael (2019). Homosexuelle, Seilschaften, Verrat: Ein transnationales Stereotyp im 20. Jahrhundert [Homosexuals, Political Cliques, and Betrayal: A 20th Century Transnational Stereotype] (in German). De Gruyter. ISBN978-3-11-063650-5.
Vagts, Detlev (2012). "Carl Schmitt's Ultimate Emergency: The Night of the Long Knives". The Germanic Review: Literature, Culture, Theory. 87 (2): 203–209. doi:10.1080/00168890.2012.675795.
Gerwarth, Robert (2011). Hitler's Hangman: The Life of Heydrich. Yale University Press. ISBN978-0-300-17746-6.
^From Weimar to Hitler: Studies in the Dissolution of the Weimar Republic and the Establishment of the Third Reich, 1932-1934. Berghahn Books. 2019. ISBN978-1-78533-917-2.
^Winkler, Heinrich August (2015). The Age of Catastrophe: A History of the West 1914–1945. Yale University Press. ISBN978-0-300-21309-6.