Тетрафобия (Russian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Тетрафобия" in Russian language version.

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archive.org

  • Havil, Julian. Nonplussed: Mathematical Proof of Implausible Ideas (Hardcover) (англ.). — Princeton University Press, 2007. — P. 153. — ISBN 0691120560.

theguardian.com

web.archive.org