Casting out nines (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Casting out nines" in English language version.

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archive.org

Heath (1921, pp. 113–117), Hippolytus of Rome (1919, pp. 30–32). Heath, Thomas (1921), A History of Greek Mathematics, vol. I: From Thales to Euclid, Oxford: Oxford University Press Hippolytus of Rome (1919) [c.230], The Refutation of all Heresies, translated by MacMahon, J.H., In Roberts & Donaldson (1919, pp. 9–153)
Datta & Singh (1962, pp. 180–184)
Datta & Singh (1962, p. 184)

books.google.com

Krantz (2010, pp. 67–70) Krantz, Steven G. (2010), An Episodic History of Mathematics—Mathematical Culture through Problem Solving, The Mathematical Association of America, ISBN 978-0-88385-766-3, LCCN 2010921168

loc.gov

lccn.loc.gov

Krantz (2010, pp. 67–70) Krantz, Steven G. (2010), An Episodic History of Mathematics—Mathematical Culture through Problem Solving, The Mathematical Association of America, ISBN 978-0-88385-766-3, LCCN 2010921168
Long (1972, p. 83) Long, Calvin T. (1972), Elementary Introduction to Number Theory (2nd ed.), Lexington: D. C. Heath and Company, LCCN 77171950