Bowman, Dwight; Little, Susan E.; Lorentzen, Leif; Shields, James; Sullivan, Michael P.; Carlin, Ellen P. (2009). "Prevalence and geographic distribution of Dirofilaria immitis, Borrelia burgdorferi, Ehrlichia canis, and Anaplasma phagocytophilum in dogs in the United States: Results of a national clinic-based serologic survey". Veterinary Parasitology. 160 (1–2): 138–48. doi:10.1016/j.vetpar.2008.10.093. PMID19150176.
Little, Susan E. (2010). "Ehrlichiosis and Anaplasmosis in Dogs and Cats". Veterinary Clinics of North America: Small Animal Practice. 40 (6): 1121–40. doi:10.1016/j.cvsm.2010.07.004. PMID20933140.
Bowman, Dwight; Little, Susan E.; Lorentzen, Leif; Shields, James; Sullivan, Michael P.; Carlin, Ellen P. (2009). "Prevalence and geographic distribution of Dirofilaria immitis, Borrelia burgdorferi, Ehrlichia canis, and Anaplasma phagocytophilum in dogs in the United States: Results of a national clinic-based serologic survey". Veterinary Parasitology. 160 (1–2): 138–48. doi:10.1016/j.vetpar.2008.10.093. PMID19150176.
Little, Susan E. (2010). "Ehrlichiosis and Anaplasmosis in Dogs and Cats". Veterinary Clinics of North America: Small Animal Practice. 40 (6): 1121–40. doi:10.1016/j.cvsm.2010.07.004. PMID20933140.