gehoben. In: Neues Deutschland, vom 6. April 2013. Pierre Broué: The German Left and the Russian Opposition (1926–28). In: Revolutionary History. Bd. 2, Nr. 3, Herbst 1989, , S. 20–28. Ralf Hoffrogge: Für Lenin, gegen Stalin. Linksradikale in der Weimarer Republik: Werner Scholem und die „Ultralinken“ der KPD. In: Analyse & Kritik. Nr. 596, vom 19. August 2014, , S. 32. 1928 establishments in Germany 1933 disestablishments in Germany Defunct communist parties in Germany Political parties established in 1928 Political parties disestablished in 1933 Left communist organizations International Revolutionary Marxist Centre