“References.” Charming Proofs: A Journey into Elegant Mathematics, by Claudi Alsina and Roger B. Nelsen, 1st ed., vol. 42, Mathematical Association of America, 2010, pp. 275–288, www.jstor.org/stable/10.4169/j.ctt6wpwnz.18. Accessed 14 June 2021.
Alsina, C., & Nelsen, R. (2010). References. In Charming Proofs: A Journey into Elegant Mathematics (pp. 275-288). Mathematical Association of America. Retrieved June 14, 2021, from http://www.jstor.org/stable/10.4169/j.ctt6wpwnz.18
Alsina, Claudi, and Roger B. Nelsen. "References." In Charming Proofs: A Journey into Elegant Mathematics, 275-88. Mathematical Association of America, 2010. Accessed June 14, 2021. http://www.jstor.org/stable/10.4169/j.ctt6wpwnz.18.
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