A.H.G. Fokker Dies. Airplane Designer. Pioneer Manufacturer Victim of Rare Disease After 'a Most Gallant Fight'. Made World War Craft. Synchronized Propeller With Machine Gun to Permit Firing Between Blades. New York Times. 24 December 1939. Dostupné online [cit. 1 October 2012].Je zde použita šablona {{Cite news}} označená jako k „pouze dočasnému použití“.
