“Delightful Theorems.” Beautiful Mathematics, by Martin Erickson, 1st ed., Mathematical Association of America, Washington, DC, 2011, pp. 49–82, www.jstor.org/stable/10.4169/j.ctt13x0n39.7. Accessed 18 June 2021.
Erickson, M. (2011). Delightful Theorems. In Beautiful Mathematics (pp. 49-82). Washington, DC: Mathematical Association of America. Retrieved June 18, 2021, from http://www.jstor.org/stable/10.4169/j.ctt13x0n39.7
Erickson, Martin. "Delightful Theorems." In Beautiful Mathematics, 49-82. Washington, DC: Mathematical Association of America, 2011. Accessed June 18, 2021. http://www.jstor.org/stable/10.4169/j.ctt13x0n39.7.
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