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References
- 1 2 3 4 Glick, Thomas; Ivesey, Steven; Wallis, Faith (29 September 2005). Medieval Science Technology and Medicine: An Encyclopedia. Routledge. p. 292. ISBN 140394766X.
- ↑ Introductorium ad judicia astronomiae, Herbermann, Charles, ed. (1913). . Catholic Encyclopedia . New York: Robert Appleton Company.
- ↑ Lynn Thorndike, A History of Magic and Experimental Science, vol. 3, (New York: Columbia University Press, 1934), pp. 262-6.
- ↑ Thorndike, Lynn (1 July 1934). A History of Magic and Experimental Science: & 4. Fourteenth and Fifteenth Centuries . Columbia University Press. pp. 258–259. ISBN 0231087977.
- ↑ Grendler, Paul (29 September 2004). The Universities of Italian Renaissance. Johns Hopkins University Press. pp. Chapter 12. ISBN 0801880556.
- ↑ Bolt, Marvin; Trimble, Virginia; Bracher, Katherine; Williams, Thomas; Hockey, Thomas (5 January 2009). The Biographical Encyclopedia of Astronomers. Springer. pp. 598–600. ISBN 978-0387351339.
- ↑ Kusukawa, Sachiko. "Astronomical Tables". Starry Messenger. University of Cambridge . Retrieved 3 June 2014.
- ↑ Lynn Thorndike, A History of Magic and Experimental Science, vol. 3, (New York: Columbia University Press, 1934), pp. 253-8, 267.
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