Werner Angress, Stillborn Revolution: The Communist Bid for Power in Germany, 1921–1923 (Princeton, 1963); Ben Fowkes, Communism in Germany under the Weimar Republic (London, 1984), 148, 161; Eric D. Weitz, Creating German Communism, 1890–1990: From Popular Protests to Socialist State (Princeton, 1997), 100-31; и в первую очередь Hermann Weber, Die Wandlung des deutschen Kommunismus: Die Stalinisierung der KPD in der Weimarer Republik (2 vols., Frankfurt am Main, 1969).
