Saenz, Gillian, et al. “The Asymmetric Propeller Revisited.” Martin Gardner in the Twenty-First Century, edited by Michael Henle and Brian Hopkins, 1st ed., Mathematical Association of America, 2012, pp. 7–10, www.jstor.org/stable/10.4169/j.ctt13x0ng0.5. Accessed 27 Feb. 2021.
Saenz, G., Jackson, C., & Crumley, R. (2012). The Asymmetric Propeller Revisited. In Henle M. & Hopkins B. (Eds.), Martin Gardner in the Twenty-First Century (pp. 7-10). Mathematical Association of America. Retrieved February 27, 2021, from http://www.jstor.org/stable/10.4169/j.ctt13x0ng0.5
Saenz, Gillian, Christopher Jackson, and Ryan Crumley. "The Asymmetric Propeller Revisited." In Martin Gardner in the Twenty-First Century, edited by Henle Michael and Hopkins Brian, 7-10. Mathematical Association of America, 2012. Accessed February 27, 2021. http://www.jstor.org/stable/10.4169/j.ctt13x0ng0.5.
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