1. American Humane Association (AHA) 2013 U.S. Pet (Dog and Cat) Population Fact Sheet: Pet Demographic Data http://www.americanhumane.org/assets/pdfs/pets-fact-sheet.pdf
2. American Kennel Club (AKC) 2013 Breed Matters http://www.akc.org/breeds/index.cfm
3. Rabies in a puppy imported from India to the USA, March 2007;Castrodale;Zoonoses Public Health,2008
4. Rabies in a dog imported from Iraq-New Jersey, June 2008;Centers for Disease Control and Prevention (CDC);MMWR Morb. Mortal. Wkly Rep.,2008