Sotomayor-Ríos, A. and Torres-Cardona, S. (1984) “Agronomic Comparison, Heterosis and Hydrocyanic Acid Potential (HCN-p) of Sudangrass-Sorghum and Sudangrass-Sudangrass Hybrids and Their Parents”, The Journal of Agriculture of the University of Puerto Rico, 68(2), pp. 143–155. doi: 10.46429/jaupr.v68i2.7272.