Stillwell, John. “A Modular Miracle.” Martin Gardner in the Twenty-First Century, edited by Michael Henle and Brian Hopkins, 1st ed., Mathematical Association of America, 2012, pp. 271–272, www.jstor.org/stable/10.4169/j.ctt13x0ng0.40. Accessed 26 Feb. 2021.
Stillwell, J. (2012). A Modular Miracle. In Henle M. & Hopkins B. (Eds.), Martin Gardner in the Twenty-First Century (pp. 271-272). Mathematical Association of America. Retrieved February 26, 2021, from http://www.jstor.org/stable/10.4169/j.ctt13x0ng0.40
Stillwell, John. "A Modular Miracle." In Martin Gardner in the Twenty-First Century, edited by Henle Michael and Hopkins Brian, 271-72. Mathematical Association of America, 2012. Accessed February 26, 2021. http://www.jstor.org/stable/10.4169/j.ctt13x0ng0.40.
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