SM U-31 (Austria-Hungary) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "SM U-31 (Austria-Hungary)" in English language version.

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gwpda.org

Baumgartner and Sieche, as excerpted here (reprinted and translated into English by Sieche). Retrieved 1 December 2008.

"Tengeralattjárók" (PDF) (in Hungarian). Imperial and Royal Navy Association. pp. 25–26. Archived from the original (PDF) on 11 October 2021. Retrieved 22 January 2009.

Rigele went on to command two German U-boats in the Second World War, UD-1 and UD-3, both captured Dutch submarines. See: Helgason, Guðmundur. "WWI U-boat commanders: Hermann Rigele". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 22 January 2009.
Helgason, Guðmundur. "WWI U-boats: KUK U31". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 22 January 2009.
Helgason, Guðmundur. "WWI U-boat commanders: Franz Nejebsy". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 22 January 2009.
Helgason, Guðmundur. "Ships hit during WWI: Lealta". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 22 January 2009.
Helgason, Guðmundur. "WWI U-boat commanders: Hermann Rigele". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 22 January 2009.
Helgason, Guðmundur. "Ships hit during WWI: Weymouth (hms)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 22 January 2009.
Helgason, Guðmundur. "Ships hit by KUK U31". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 January 2009.

"Tengeralattjárók" (PDF) (in Hungarian). Imperial and Royal Navy Association. pp. 25–26. Archived from the original (PDF) on 11 October 2021. Retrieved 22 January 2009.