Alsina, C., and A. Monreal. “Proof Without Words: (a + b)^3 = a^3 +3a^2b +3ab^2 + b^3”. Teaching Mathematics and Computer Science 1, no. 1 (June 1, 2003): 157. Accessed September 27, 2024. https://ojs.lib.unideb.hu/tmcs/article/view/14691.