Pérez-López, A., A. Sotomayor-Ríos, and S. Torres-Rivera. “Studies on Characters of Chironja Seedling Trees”. The Journal of Agriculture of the University of Puerto Rico 64, no. 2 (April 1, 1980). Accessed December 8, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/10237.