Peder Bokenhielm: Så här startade jag Bränsleupproret - Sveriges största folkrörelse
FrihetsNytt
Interrogation of Crew of U-570 - October, 1941
World War 2 - U-Boat Crew Interrogation Reports
The War Archive: The Grey Wolves | U-Boats 1943-1945 (Volume 3)
Adaneth - History&Politics
Wings of the Luftwaffe: Seaplanes (1992, Aviation History Documentary)
Alex4History
Interrogation of Survivors of U-93 - April, 1942
World War 2 - U-Boat Crew Interrogation Reports