Ryan, E. T., Crean, T. I., John, M., Butterton, J. R., Clements, J. D., & Calderwood, S. B. (1999). In Vivo Expression and Immunoadjuvancy of a Mutant of Heat-Labile Enterotoxin of Escherichia coli in Vaccine and Vector Strains of Vibrio cholerae. American Society for Microbiology.

Ryan, Edward T., Thomas I. Crean, Manohar John, Joan R. Butterton, John D. Clements, and Stephen B. Calderwood. In Vivo Expression and Immunoadjuvancy of a Mutant of Heat-Labile Enterotoxin of Escherichia Coli in Vaccine and Vector Strains of Vibrio Cholerae. American Society for Microbiology, 1999.

Ryan, Edward T., et al. In Vivo Expression and Immunoadjuvancy of a Mutant of Heat-Labile Enterotoxin of Escherichia Coli in Vaccine and Vector Strains of Vibrio Cholerae. American Society for Microbiology, 1999.