Número trigonométrico (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Número trigonométrico" in Spanish language version.

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arxiv.org

Zhou, Li and Markov, Lubomir (2010). «Recurrent Proofs of the Irrationality of Certain Trigonometric Values». American Mathematical Monthly 117 (4): 360-362. arXiv:(s2cid:19311924) 0911.1933 (s2cid:19311924). doi:10.4169/000298910x480838.

doi.org

dx.doi.org

Zhou, Li and Markov, Lubomir (2010). «Recurrent Proofs of the Irrationality of Certain Trigonometric Values». American Mathematical Monthly 117 (4): 360-362. arXiv:(s2cid:19311924) 0911.1933 (s2cid:19311924). doi:10.4169/000298910x480838.

issn.org

portal.issn.org

Niven, Ivan. Numbers: Rational and Irrational, 1961. Random House. New Mathematical Library, Vol. 1. ISSN 0548-5932.