Winkler, William G.; Baker, Everette F.; Hopkins, Cyrus C. (March 1972). "An outbreak of non-bite transmitted rabies in a laboratory animal colony". American Journal of Epidemiology. 95 (3): 267–277. doi:10.1093/oxfordjournals.aje.a121394. PMID4551654.
Winkler, William G.; Baker, Everette F.; Hopkins, Cyrus C. (March 1972). "An outbreak of non-bite transmitted rabies in a laboratory animal colony". American Journal of Epidemiology. 95 (3): 267–277. doi:10.1093/oxfordjournals.aje.a121394. PMID4551654.