Pérez-López, Agripino, and Rubén D. Reyes. “Effect of Nitrogen and Boron Applications on Carica Papaya L. II. Petiole and Fruit Nutrient Content and N and B Index for Leaf Tissue Analysis”. The Journal of Agriculture of the University of Puerto Rico 68, no. 1 (January 1, 1984): 5–17. Accessed November 23, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/7254.