ISBN 0-521-52290-0*Boyle, John Andrew, "History of the World Conqueror", Manchester, 1958*de Rachewiltz, Igor, "In the Service of the Khan: Eminent personalities of the early Mongol-Yuan period (1200–1300)", Wiesbaden, 1992*de Rachewiltz, Igor, "The Secret History of the Mongols: A Mongolian Epic Chronicle of the Thirteenth Century", Brill, 2004*Devi, Savitri, "The Lightning and the Sun", 1958 (written 1948–56) ISBN 978-0-937944-14-1*Gabriel, Richard A., "Genghis Khan's Greatest General: Subotai the Valiant".
ISBN 0-521-52290-0*Boyle, John Andrew, "History of the World Conqueror", Manchester, 1958*de Rachewiltz, Igor, "In the Service of the Khan: Eminent personalities of the early Mongol-Yuan period (1200–1300)", Wiesbaden, 1992*de Rachewiltz, Igor, "The Secret History of the Mongols: A Mongolian Epic Chronicle of the Thirteenth Century", Brill, 2004*Devi, Savitri, "The Lightning and the Sun", 1958 (written 1948–56) ISBN 978-0-937944-14-1*Morgan, David (1990).