Primary sources:
- Arrian. The Anabasis of Alexander. (gutenburg.org 2nd Century AD). Book 1 chapter 1.
- Plutarch. Life of Alexander: Alexander and Bucephalus. (livius.org Around 100 A.D.) Section 6.
- Quintus Curtius Rufus. The History of Alexander. (History of Macedonia.org 1st Century A.D.) 20-255.
-Plutarch. Alexander. (web.article.org) 9-10
-Anabasis of Alexander: The Battle of Gaugamela. 2nd Century (Book III, 7-16)

Secondary sources:
-J. Abbott. Battle of mount Haemus. (Alexander-the-great.org 2021). Part of the Balkan campaign.
-Mary Franklin-Brown. The Monstrous Birth of Alexander the Great: Thomas de Kent’s Roman de toute chevalerie and Twelfth-Century Natural Science. (The Journal of Medieval and Early Modern Studies. 2019). 541-561.
-Manfred Kets de Vries. ‘Doing an Alexander’:: Lessons on Leadership by a Master Conqueror (Elsevier Ltd European management journal, 2003). Vol.21 (3), p.370-375
-Paul Properzio. The Treasures of Alexander the Great: How One Man's Wealth Shaped the World by Frank L. Holt (review) 2017. 584-585.-Hutan Ashrafian. The Death Of Alexander The Great- A Spinal Twist Of Fate. (Journal of the History of the Neurosciences 2004). Vol.13 (2) 138-142