Talleyrand, H., R. Pérez-Escolar, M. A. Lugo-López, and T. W. Scott. “Utilization of N from Crop Residues in Oxisols and Ultisols”. The Journal of Agriculture of the University of Puerto Rico, vol. 61, no. 4, Oct. 1977, pp. 450-5, doi:10.46429/jaupr.v61i4.10408.