Wahab, Abdul H., Percy Aitken-Soux, Irving Johnson, César Paniagua, Bo-Myeong Woo, Howard Murray, Joseph Dehaney, and Miguel A. Lugo-López. “Multiple Cropping in the Hillsides of Jamaica”. The Journal of Agriculture of the University of Puerto Rico 69, no. 3 (July 1, 1985): 273–282. Accessed December 3, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/7355.