in the Third Reich, University of North Carolina Press, 1999, p. 190. Walker, Andrew. Nazi War Trials. UnitedKingdom: Pocket Essentials. 2006: 141. ISBN 1-903047-50-1
(英语). Unit, British Bombing Survey. The Strategic Air War Against Germany, 1939-1945: Report of the British Bombing Survey Unit. Psychology Press. 1998