Claasen, Adam R. A. Hitler's Northern War: The Luftwaffe's Ill-Fated Campign, 1940-1945. Lawrence, KS: University Press of Kansas, 2001 
Brief section on air operations against Denmark
Ellis, John. World War II: A Statistical Survey: The Essential Facts and Figures for All the Combatants. New York: Facts on File, 1993 
Epstein, M. (editor). The Statesman's Year-Book: Statistical and Historical Annual of the States of the World for 1941. London: Macmillan, 1941
Gilmour, John and Jill Stephenson (editors). Hitler's Scandinavian Legacy. London: Bloomsbury - Forthcoming June 2013
Giltner, Philip. In the Friendliest Manner: German-Danish Economic Cooperation during the Nazi Occupation. New York: Peter Lang, 1998
Haestrup, Jorgen. Secret Alliance: A Study of the Danish Resistance Movement, 1940-1945. Odense, Denmark: Odense University Press, 1976
Hubatsch, Walther. Weserubung: Die Deutsche Besetzung von Danemark und Norwegen 1940. Berlin: Musterschmidt-Verlag, 1960 German perspective
Jespersen, Knud J.V. No Small Achievement: Special Operations Executive and the Danish Resistance, 1940-1945. Odense, Denmark: University Press of Southern Denmark, 2002
Kaufmann, J. E. and H. W. Kaufmann. Hitler's Blitzkrieg Campaigns: The Invasion and Defense of Western Europe, 1939-1940. Conshohocken, PA: Combined Books, 1993
Lampe, David. Hitler's Savage Canary: A History of the Danish Resistance in World War II. Barnsley, UK: Pen and Sword Books Ltd, 2010
Naval Intelligence Division. Denmark. London: HMSO, 1944
Nissen, Henrik S. Scandinavia during the Second World War. Minneapolis: University of Minnesota Press, 1983
Outze, Borge (editor). Denmark during the German Occupation. Copenhagen: Scandinavian Publishing Company, 1946
Petrow, Richard. The Bitter Years: The Invasion and Occupation of Denmark and Norway, April 1940-May 1945. New York: Morrow, 1979
Seymour, Susan. Anglo-Danish Relations and Germany, 1933-1945. Odense, Denmark: Odense University Press, 1982
Shores, Christopher et al. Fledgling Eagles: The Complete Account of Air Operations during the Phoney War and Norwegian Campaign, 1940. London: Grub Street, 1991 Includes Danish air OB
Thomas, John Oram. The Giant-Killers: The Story of the Danish Resistance Movement, 1940-1945. London: Joseph, 1975
Ziemke, Earl. The German Northern Theater of Operations, 1940-1945. Washington DC: Government Printing Office, 1959
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