Ham, J. H., Bauer, D. W., Fouts, D. E., & Collmer, A. (1998). A cloned Erwinia chrysanthemi Hrp (type III protein secretion) system functions in Escherichia coli to deliver Pseudomonas syringae Avr signals to plant cells and to secrete Avr proteins in culture. The National Academy of Sciences.

Ham, Jong Hyun, David W. Bauer, Derrick E. Fouts, و Alan Collmer. A Cloned Erwinia Chrysanthemi Hrp (type III Protein Secretion) System Functions in Escherichia Coli to Deliver Pseudomonas Syringae Avr Signals to Plant Cells and to Secrete Avr Proteins in Culture. The National Academy of Sciences, 1998.

Ham, Jong Hyun, David W. Bauer, Derrick E. Fouts, و Alan Collmer. A Cloned Erwinia Chrysanthemi Hrp (type III Protein Secretion) System Functions in Escherichia Coli to Deliver Pseudomonas Syringae Avr Signals to Plant Cells and to Secrete Avr Proteins in Culture. The National Academy of Sciences, 1998.