Helgason, Guðmundur. "War Patrols by U-60". German U-boats of WWII - uboat.net. Archived from the original on 7 September 2008. Retrieved 29 April 2010.
Helgason, Guðmundur. "War Patrols by U-60". German U-boats of WWII - uboat.net. Archived from the original on 7 September 2008. Retrieved 29 April 2010.