Díaz-Rivera, M., P. R. Hepperly, G. Riveros, and L. Almodóvar-Vega. “Weed-Crop Competition in Pigeon Peas in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico, vol. 69, no. 2, Apr. 1985, pp. 201-13, doi:10.46429/jaupr.v69i2.7344.