Delpín, Herminio, and Franklin W. Martin. “Establishing Sapogenin-Bearing Dioscoreas from Seed”. The Journal of Agriculture of the University of Puerto Rico 54, no. 2 (April 1, 1970): 334–340. Accessed September 26, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/11097.