Dewdney, M. M., J. D. Burrow, L. M. Diepenbrock, R. H. Brlansky, and T. M. Spann. “Citrus Greening (Huanglongbing; HLB) Blight and Tristeza Comparison Identification Sheet: PP263, Rev. 4/2020”. EDIS, vol. 2020, no. 3, Apr. 2020, p. 2, doi:10.32473/edis-pp263-2020.