Hepperly, Paul R., and Ezequiel Ramos-Dávila. “Erwinia Chrysanthemi Burk., McFadden and Dimock: A Bacterial Whorl and Stalk Rot Pathogen of Sorghum [Sorghum Bicolor (L.) Moench.]”. The Journal of Agriculture of the University of Puerto Rico, vol. 71, no. 3, July 1987, pp. 265-7, doi:10.46429/jaupr.v71i3.6967.