Rodríguez, Rocío, and P. L. Meléndez. “Occurrence of Sphaeropsis Knot on Citron (Citrus Medica L.) in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 68, no. 2 (April 1, 1984): 179–183. Accessed April 25, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/7276.