Rodríguez, Saulo J., et al. “DWARFING EFFECT OF ETHREL (2-CHLOROETHYLPHOSPHONIC ACID) ON CORDYLINE TERMINALIS VAR. BABY DOLL”. The Journal of Agriculture of the University of Puerto Rico, vol. 56, no. 4, Oct. 1972, pp. 439-41, doi:10.46429/jaupr.v56i4.10807.