* {{citeCite book |ref= harv|last=Daniels|first=Robert Vincent|title=A Documentary History of Communism in Russia: From Lenin to Gorbachev|url=http://books.google.com/books?id=gTIZ2dvDKF0C|date = 1. January1. 1993.|publisher=UPNE|isbn=978-0-87451-616-6}}