1. U.S. Army Medical Department. Disponible en: http://history.amedd.army.mil/booksdocs/itsfirst50yrs/section1.1.htm
2. Science Nevos Online. Disponible en: http://www.sciencenews.org/20010224/timeline.asp
3. Tifus murino, una causa frecuente de síndrome febril de media evolución;Gutiérrez-Ravé;An Med Intern (Madrid),1986
4. Rickettsioses as paradigms of new or emerging infectious diseases;Raoult;Clin Microbiol Rev,1997
5. Epidemiology of murine typhus;Azad;Annu Rev Entomol,1990