Román-Pérez, Félix M., et al. “Performance of Chironja (clone 2-4) on Five Rootstocks After Eight Years of Growth in Two Zones of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico, vol. 93, no. 3-4, Oct. 2009, pp. 187-93, doi:10.46429/jaupr.v93i3-4.5466.