|Turnbull, The Ottoman Empire 1326-1699, p||36 "Hunyadi led an army of 24,000 men, including 8,000 Wallachians, but suffered another military defeat without even seeing his Albanian allies|
|Imber, Colin, The Ottoman Empire||New Haven and London: Yale University Press, 2010|
Decline and Fall of Byzantium to the Ottoman Turks, by Doukas.8
|Madison, Wisconsin: University of Wisconsin Press|
|Kenneth Meyer Setton; Harry Williams Hazard; Norman P||Franz Babinger, Mehmed the Conqueror and His Time, Princeton University Press, 1978 , page 14|
Sugar, A History of East Central Europe:Southeastern Europe under Ottoman Rule, 1354-1804, Vol.