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$\textit{Citations}$  \vspace{2mm}  Chandra, Pravin and Weisstein, Eric W. "Fibonacci Number." From MathWorld--A Wolfram Web Resource  Knott, R. (2013, November 4). The life and numbers of Fibonacci. Retrieved February 08, 2016, from https://plus.maths.org/content/life-and-numbers-fibonacci