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{{Commonscat|Arabic numerals}}
* -{[http://www.historyworld.net/wrldhis/PlainTextHistories.asp?historyid=ab34 -{History of Counting Systems and Numerals]. Приступљено 11 December 2005.}-
* -{[http://www.laputanlogic.com/articles/2003/06/01-95210802.html -{The Evolution of Numbers] {{Wayback|url=http://www.laputanlogic.com/articles/2003/06/01-95210802.html |date=20120322183224 }}. 16 April 2005.}-
* -{[https://web.archive.org/web/20120321111930/http://sciences.aum.edu/~sbrown/Hindu%20Arabic%20and%20Chinese.pdf Development of Hindu Arabic and Traditional Chinese Arithmetic] }-
* -{O'Connor, J. J. and Robertson, E. F. [https://web.archive.org/web/20150706140353/http://www-gap.dcs.st-and.ac.uk/%7Ehistory/HistTopics/Indian_numerals.html Indian numerals]. November 2000.}-