Chú thích Brāhmasphuṭasiddhānta

  1. ↑ “Brahmagupta | Indian astronomer”. Encyclopedia Britannica (bằng tiếng Anh).
  2. ↑ Bradley, Michael. The Birth of Mathematics: Ancient Times to 1300, p. 86 (Infobase Publishing 2006).
  3. ↑ Mackenzie, Dana. The Universe in Zero Words: The Story of Mathematics as Told through Equations, p. 61 (Princeton University Press, 2012).
  4. ↑ Henry Thomas Colebrooke. Algebra, with Arithmetic and Mensuration, from the Sanscrit of Brahmegupta and Bháscara, London 1817, p. 339 (online)
  5. ↑ Kaplan, Robert (1999). The nothing that is: A natural history of zero. New York: Oxford University Press. tr. 68–75. ISBN 0-19-514237-3.