"Horst Boog, Werner Rahn, Reinhard Stump & Bernd Wegner, Germany and the Second World War. Volume VI/I & VI/II. The Global War: Widening of the Conflict into a World War and the Shift of the Initiative 1941-1943" - Lak, Martijn (TSEG - The Low Countries Journal of Social and Economic History, 2016)