Кирилски цифри (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Кирилски цифри" in Bulgarian language version.

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Chrisomalis, Stephen. Numerical Notation: A Comparative History. Cambridge, England, Cambridge University Press, 2010. ISBN 978-1-139-48533-3. с. 180 – 182.
Yefimov, Vladimir. Language Culture Type: International Type Design in the Age of Unicode. New York City, Graphis Press, 2002. ISBN 978-1932026016. с. 369 – 147.
Looijen, Maarten. Over Getallen Gesproken/Talking About Numbers. 2nd. Zaltbommel, Netherlands, Van Haren Publishing, 2015. ISBN 978-94-018-0601-5. с. 59 – 60.

Dejić, Mirko. How the old Slavs (Serbs) wrote numbers // BSHM Bulletin: Journal of the British Society for the History of Mathematics 29 (1). 2013. DOI:10.1080/17498430.2013.805559. с. 2 – 17.