Fine 1994, p. 410: Vuk Branković charged him with being in secret contact with the Turks. When Lazar faced Miloš with the charge, Miloš denied it, saying, "Tomorrow my deeds will show that I am faithful to my lord." To prove his loyalty, shortly before dawn on 28 June (the day on which the battle occurred) Miloš slipped out of the Serbian camp and announced himself to the Turkish sentries as a Serbian deserter. Taken to the sultan, he pulled out a knife he had secreted in his garments and stabbed Murad, fatally wounding him. We do not know whether there had actually been any accusations in the Serbian camp before the battle, but it is a fact that a Serb named Miloš Obilić (or Kobilić) did desert and murder the Sultan. Fine, John Van Antwerp Jr. (1994) [1987]. The Late Medieval Balkans: A Critical Survey from the Late Twelfth Century to the Ottoman Conquest. Ann Arbor, Michigan: University of Michigan Press. ISBN0472082604.
Popović 2006, p. 119 Popović, Danica (2006). Патријарх Јефрем – један позносредњовековни светитељски култ. Zbornik radova Vizantološkog instituta (in Serbian). 43. Belgrade: Vizantološki institut, SANU. ISSN0584-9888.
Stijović 2008, p. 457 Stijović, Rada (2008), Неке особине народног језика у повељама кнеза Лазара и деспота Стефана, Južnoslovenski Filolog (in Serbian), 64, Belgrade: Serbian Academy of Sciences and Arts, ISSN0350-185X