Siddiqi, Amir Hasan (1970), Cultural centres of Islam, Jamiyat-ul-Falah Publications, m/s. 90, Among them, a Turk from Central Asia, Ali Kuscu, was one of the finest mathematicians and astronomers of his epoch
"During the fifteenth century this method of representing decimal fractions came to be known outside the Islamic world as the Turkish method, after a Turkish colleague of al-Kashi, known as Ali Qushji, who provided an explanation." Joseph, George Gheverghese (2010) The crest of the peacock: non-European roots of mathematics Princeton University Press, p. 469.ISBN 0-691-13526-6, ISBN 978-0-691-13526-7
G. A. Russell, The 'Arabick' Interest of the Natural Philosophers in Seventeenth-century England, BRILL, 1994, ISBN 90-04-09888-7, p. 162; "Greaves quotes from Risala dar 'ilm al-Hay’a of 'Ali b. Muh. 'Ala al-Din Qushji. This Persian author was the son of an official of Ulugh Beg, and also a student of Qadi Zadeh".
G. Akovalı, Z. A. Mansūrov, The role of government and research institutes in the planning of research and development in some Central Asian and Caucasian republics, IOS Press, 2000,ISBN 1-58603-022-1, ISBN 978-1-58603-022-3, p.230,[1]
