Analysis of information sources in references of the Wikipedia article "Battle of Ankara" in English language version.
Nicolle, David (1983). Armies of the Ottoman Turks 1300–1774. Bloomsbury USA. ISBN 978-0-85045-511-3.[t]he sizes of the two armies are reliably estimated at 140,000 on Timur's side and no more than 85,000 under Sultan Bayezid I