commanders: ErichFörste. German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. [2015-03-09]. 陈进,第239頁. Dodson & Cant,第129頁. Gröner, Erich;
Uboat.net. [2022-03-28]. Helgason, Guðmundur. WWI U-boat commanders: ErichFörste. German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat
Uboat.net. [2015-02-23]. Helgason, Guðmundur. WWI U-boat commanders: Hans Förste. German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat
CITEREFvan_Oostrom1992 (help) Bayerisches Hauptstaatsarchiv, Fürstensachen Nr. 148. Dazu Erich Wille, Die Schlacht von Othée. 23. September 1408, Dissertation