Commanders at War

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Stern，第193頁. Helgason, Guðmundur. WWI U-boat commanders: Heino von Heimburg. German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. [14

U-10号潜艇 (奥匈帝国)

Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. [2008-11-03]. Helgason, Guðmundur. WWI U-boat commanders: Franz Wäger. German and Austrian

UB-17号潜艇

(help) Helgason, Guðmundur. WWI U-boat commanders: Ralph Wenninger. German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. [2009-03-19]

U-71号潜艇 (1915年)

U-boats of World War I - Kaiserliche Marine - Uboat.net. [24 December 2014]. Gröner 1991，第10–11頁. Helgason, Guðmundur. WWI U-boat commanders: Hugo Schmidt

U-52号潜艇 (1915年)

Helgason, Guðmundur. WWI U-boat commanders: Hans Walther (Pour le Mérite). German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net