Sotomayor-Ríos, A., and D. E. Weibel. “Evaluation of Seven Sorghums, Selfed and Crossed to Three Cytoplasmic Male-Sterile Lines”. The Journal of Agriculture of the University of Puerto Rico, vol. 62, no. 2, Apr. 1978, pp. 156-64, doi:10.46429/jaupr.v62i2.10376.