Hans Schafranek, Natalia Musienko, "The Fictitious 'Hitler-Jugend' of the Moscow NKVD" in: Barry McLoughlin, Kevin McDermott (Eds.), Stalin's Terror: High Politics and Mass Repression in the Soviet Union. Palgrave MacMillan (2003), pp. 217-218 ISBN1-4039-0119-8. Retrieved December 1, 2011