Gonzalez, Diego Luis, Simone Giannerini, and Rodolfo Rosa. “The Mathematical Structure of the Genetic Code: A Tool for Inquiring on the Origin of Life”. Statistica 69, no. 2/3 (January 1, 2009): 143–157. Accessed May 22, 2022. https://rivista-statistica.unibo.it/article/view/3553.