Sotomayor-Ríos, A., K. F. Schertz, R. Woodbury, and J. Vélez Fortuño. “Taxonomic Description and Reproductive Behavior of Giant Pangola (Digitaria Valida Stent)”. The Journal of Agriculture of the University of Puerto Rico 44, no. 2 (April 1, 1960): 53–59. Accessed December 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12093.