^According to Scherzer as leader of Grenadier-Regiment 11.[6]
^Major Joachim Domaschk, who processed the nomination at the Heerespersonalamt (HPA—Army Staff Office) from the troop, had sent a message to the AOK Ostpreußen on 28 March 1945 requesting an approval from the Armeekorps and the Armee. This approval was never received before the end of hostilities. Oskar-Hubert Dennhardt is not listed in the book for the "nominations for the higher grades of the Knight's Cross of the Iron Cross" nor in the nomination book for Knight's Cross (starting with Nr. 5100). According to the Association of Knight's Cross Recipients (AKCR) the award was presented in accordance with the Dönitz-decree. This is illegal according to the Deutsche Dienststelle (WASt) and lacks legal justification. The sequential number "870" and the presentation date were assigned by the AKCR. Dennhardt was a member of the AKCR.[8]
Fellgiebel, Walther-Peer (2000) [1986]. Die Träger des Ritterkreuzes des Eisernen Kreuzes 1939–1945 — Die Inhaber der höchsten Auszeichnung des Zweiten Weltkrieges aller Wehrmachtteile [The Bearers of the Knight's Cross of the Iron Cross 1939–1945 — The Owners of the Highest Award of the Second World War of all Wehrmacht Branches] (in German). Friedberg, Germany: Podzun-Pallas. ISBN978-3-7909-0284-6.
Patzwall, Klaus D.; Scherzer, Veit (2001). Das Deutsche Kreuz 1941 – 1945 Geschichte und Inhaber Band II [The German Cross 1941 – 1945 History and Recipients Volume 2] (in German). Norderstedt, Germany: Verlag Klaus D. Patzwall. ISBN978-3-931533-45-8.
Scherzer, Veit (2007). Die Ritterkreuzträger 1939–1945 Die Inhaber des Ritterkreuzes des Eisernen Kreuzes 1939 von Heer, Luftwaffe, Kriegsmarine, Waffen-SS, Volkssturm sowie mit Deutschland verbündeter Streitkräfte nach den Unterlagen des Bundesarchives [The Knight's Cross Bearers 1939–1945 The Holders of the Knight's Cross of the Iron Cross 1939 by Army, Air Force, Navy, Waffen-SS, Volkssturm and Allied Forces with Germany According to the Documents of the Federal Archives] (in German). Jena, Germany: Scherzers Militaer-Verlag. ISBN978-3-938845-17-2.
Thomas, Franz (1997). Die Eichenlaubträger 1939–1945 Band 1: A–K [The Oak Leaves Bearers 1939–1945 Volume 1: A–K] (in German). Osnabrück, Germany: Biblio-Verlag. ISBN978-3-7648-2299-6.
Thomas, Franz; Wegmann, Günter (1998). Die Ritterkreuzträger der Deutschen Wehrmacht 1939–1945 Teil III: Infanterie Band 4: C–Dow [The Knight's Cross Bearers of the German Wehrmacht 1939–1945 Part III: Infantry Volume 4: C–Dow] (in German). Osnabrück, Germany: Biblio-Verlag. ISBN978-3-7648-2534-8.