Helgason, Guðmundur. "WWI U-boat commanders: Werner Löwe". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 3 February 2015.
Helgason, Guðmundur. "Ships hit by UB 58". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 3 February 2015.