Hitler and the Mass Murders in Poland 1939/40", Hitler's Role in the Persecution of the Jews by the Nazi Regime, Atlanta: Emory University, retrieved 5 August 2014.
Hitler and the Mass Murders in Poland 1939/40”, Hitler's Role in the Persecution of the Jews by the Nazi Regime, Atlanta: Emory University, truy cập ngày 5 tháng 8 năm 2014.  Manstein, Erich (2004) .