Cibes, Héctor R., and Socorro Gaztambide. “Mineral-Deficiency Symptoms Displayed by Papaya Plants Grown under Controlled Conditions”. The Journal of Agriculture of the University of Puerto Rico 62, no. 4 (October 1, 1978): 413–423. Accessed December 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10353.