Uboat.net. [2015-01-21]. Helgason, Guðmundur. WWI U-boat commanders: OttoSchultze. German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat
Orientale. 2002, 31(1): 71-104 [2022-03-27]. (原始内容存档于2022-06-16). 史鄂圖:OttoSchultze The History of Protestant Chinese Bible Translations (页面存档备份,存于互联网档案馆)