Shirer, Berlin Diary, 275-276 (20 May 1940); Hans Umbreit, ‘The Battle for Hegemony in Western Europe’, in GSWW II. 227-326, at 270-280; Julian Jackson, The Fall of France: The Nazi Invasion of 1940 (Oxford, 2003), 9-39; Ernest R. May, Strange Victory:Hitler's Conquest of France (New York, 2000).
