Rich SM, Sawyer SA, Barbour AG.  2001.  Antigen polymorphism in Borrelia hermsii, a clonal pathogenic bacterium.. Proc Natl Acad Sci U S A. 98(26):15038-43.

Widmer G, Akiyoshi D, Buckholt MA, Feng X, Rich SM, Deary KM, Bowman CA, Xu P, Wang Y, Wang X et al..  2000.  Animal propagation and genomic survey of a genotype 1 isolate of Cryptosporidium parvum.. Mol Biochem Parasitol. 108(2):187-97.