Ramírez de Hernández, Alicia. “Observations on the Chromosome Number of Pennisetum Ciliare”. The Journal of Agriculture of the University of Puerto Rico 37, no. 2 (April 1, 1953): 161–170. Accessed December 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12759.