Schumann, A., L. Waldo, P. Mungofa, and C. Oswalt. “Computer Tools for Diagnosing Citrus Leaf Symptoms (Part 2): Smartphone Apps for Expert Diagnosis of Citrus Leaf Symptoms: SL478/SS691, 9/2020”. EDIS, vol. 2020, no. 5, Oct. 2020, doi:10.32473/edis-ss691-2020.