Belarmino, Marilyn M., and Jocelyn R. Gonzales. “Somatic Embryogenesis and Plant Regeneration in Purple Food Yam (Dioscorea Alata L.)”. Annals of Tropical Research 30, no. 2 (December 3, 2008): 22–33. Accessed December 5, 2025. https://atr.vsu.edu.ph/article/view/364.