Baumgartner and Sieche, as excerpted here (reprinted and translated into English by Sieche). Retrieved 14 November 2008.
miramarshipindex.nz
Sieche (p. 21) reports that a ship named Inverberbie was sunk by U-4 on that date. Haworth reports no ships of any nationality of the name Inverberbie, but one British ship by the name Inverbervie. Helgason shows the same Inverbervie as either being sunk by U-4 or by a mine laid by the German U-boat UC-14 on 14 September 1916, which is the same fate reported by Haworth. For Haworth, see: "Inverbervie (159996)". Miramar Ship Index. For Helgason, see:Helgason, Guðmundur. "Ships hit during WWI: Inverbervie". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Sieche (p. 21) reports that a ship named Inverberbie was sunk by U-4 on that date. Haworth reports no ships of any nationality of the name Inverberbie, but one British ship by the name Inverbervie. Helgason shows the same Inverbervie as either being sunk by U-4 or by a mine laid by the German U-boat UC-14 on 14 September 1916, which is the same fate reported by Haworth. For Haworth, see: "Inverbervie (159996)". Miramar Ship Index. For Helgason, see:Helgason, Guðmundur. "Ships hit during WWI: Inverbervie". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "WWI U-boats: KUK U4". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 14 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Fiore del Mar". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit by Ships hit by KUK U4". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Dublin". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Gjovadje". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Papagallo". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Halil". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Jean Bart II". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Margaretha". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Perseo". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Italia". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit during WWI: Kerkyra". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 17 November 2008.
Helgason, Guðmundur. "Ships hit by KUK U 4". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 21 January 2015.
worldcat.org
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The Austro-Hungarian submarine U-24, was, in fact, the German Imperial Navy submarine UC-12 operating under the Austro-Hungarian flag (see Gardiner, p. 341). UC-12, a coastal minelaying submarine, was destroyed on 12 March 1916 when the crew deployed the boat's tenth mine, which malfunctioned and exploded, sinking the U-boat with all hands. See: Messimer, Dwight R. (2002). Verschollen: World War I U-boat Losses. Annapolis, Maryland: Naval Institute Press. p. 249. ISBN978-1-55750-475-3. OCLC231973419.