“About the Authors.” Charming Proofs: A Journey into Elegant Mathematics, by Claudi Alsina and Roger B. Nelsen, 1st ed., vol. 42, Mathematical Association of America, 2010, pp. 295–295, www.jstor.org/stable/10.4169/j.ctt6wpwnz.20. Accessed 28 Nov. 2020.
Alsina, C., & Nelsen, R. (2010). About the Authors. In Charming Proofs: A Journey into Elegant Mathematics (p. 295). Mathematical Association of America. Retrieved November 28, 2020, from http://www.jstor.org/stable/10.4169/j.ctt6wpwnz.20
Alsina, Claudi, and Roger B. Nelsen. "About the Authors." In Charming Proofs: A Journey into Elegant Mathematics, 295. Mathematical Association of America, 2010. Accessed November 28, 2020. http://www.jstor.org/stable/10.4169/j.ctt6wpwnz.20.
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