^Meyer EA (1996). Other Intestinal Protozoa and Trichomonas Vaginalisin: Baron's Medical Microbiology (Baron S et al, eds.) (4th ed. ed.). Univ of Texas Medical Branch. (via NCBI Bookshelf)ISBN 0-9631172-1-1
^Zuckerman AJ (1996). Hepatitis Viruses in: Baron's Medical Microbiology (Baron S et al, eds.) (4th ed. ed.). Univ of Texas Medical Branch. (via NCBI Bookshelf)ISBN 0-9631172-1-1
^Wang L, Zhuang H (2004). “Hepatitis E: an overview and recent advances in vaccine research.”. World J Gastroenterol10 (15): 2157-62. PMID15259057.
^Hale TL, Keusch GT (1996). Shigellain: Baron's
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^Giannella RA (1996). Salmonella:Epidemiology in: Baron's Medical Microbiology (Baron S et al, eds.) (4th ed. ed.). Univ of Texas Medical Branch. (via NCBI Bookshelf)ISBN 0-9631172-1-1
^Finkelstein RA (1996). Cholera, Vibrio cholerae O1 and O139, and Other Pathogenic Vibrios in: Baron's Medical Microbiology (Baron S et al, eds.) (4th ed. ed.). Univ of Texas Medical Branch. (via NCBI Bookshelf)ISBN 0-9631172-1-1