1. On SL, Lee A, O’Rourke JL et al.Genus Helicobacter. In: Garrity GM, Brenner DJ, eds. Bergey’s Manual of Systematic Bacteriology, vol 2, 2nd edn. New York: Bergey’s Manual Trust, 2003: in press.
2. Solnick JV, O’Rourke JL, Vandamme P, Lee A. The genus Helicobacter. In: Dworkin M, Falkow S, Rosenberg E, Schleifer K, Stackebrandt E, eds. The Prokaryotes: An Evolving Electronic Resource for the Microbiological Community. New York: Springer Verlag, 2003.
3. On SLW. Taxonomy of Campylobacter, Arcobacter, Helicobacter and related bacteria: current status, future prospects and immediate concerns. J Appl Microbiol. 2001; 90: 1–15.
4. Woese CR. Bacterial evolution. Microbiol Rev. 1987; 51: 221–71.
5. Olsen GJ, Woese CR. Ribosomal RNA: a key to phylogeny. FASEB J. 1993; 7: 113–23.