1. Afzelius, A. 1921. Erythema chronicum migrans. Acta Dermato-Venereol. 2: 120–125.
2. Asbrink, E., and A. Hovmark. 1988. Early and late cutaneous manifestations in Ixodes-borne borreliosis (erythema migrans borreliosis, Lyme borreliosis). Ann. NY Acad Sci. 539:4–15.
3. Austin, F. E., J. T. Barbieri, R. E. Corin, K. E. Grigas, and C. D. Cox. 1981. Distribution of superoxide dismutase, catalase, and peroxide activities among Treponema pallidum and other spirochetes. Infect. Immun. 33:372–379.
4. Barbour, A. G. 1984. Isolation and cultivation of Lyme disease spirochetes. Yale J. Biol. Med. 57:521–525.
5. Barbour, A. G. 1988. Plasmid analysis of Borrelia burgdorferi, the Lyme disease agent. J. Clin. Microbiol. 26:475–478.