Wahab, A. H., P. Aitken-Soux, I. Johnson, C. Paniagua, B.-M. Woo, H. Murray, J. Dehaney, and M. A. Lugo-López. “Multiple Cropping in the Hillsides of Jamaica”. The Journal of Agriculture of the University of Puerto Rico, vol. 69, no. 3, July 1985, pp. 273-82, doi:10.46429/jaupr.v69i3.7355.