Heidi G. Parker, Lisa V. Kim, Nathan B. Sutter, Scott Carlson, Travis D. Lorentzen, Tiffany B. Malek, Gary S. Johnson, Hawkins B. DeFrance, Elaine A. Ostrander, Leonid Kruglyak. Genetic Structure of the Purebred Domestic Dog. Science 21 May 2004. Vol. 304. no. 5674, pp. 1160 - 1164. DOI: 10.1126/science.1097406
