Bell, Jerold S. American Breed Clubs and Health Initiatives. Ostrander, Elaine A.; Giger, Urs; Lindblad-Toh, Kerstin (编). The Dog and Its Genome. CSHL Press. 2007: 40–44 [April 9, 2011]. ISBN 978-0-87969-781-5. (原始内容存档于2019-08-15).
Bell, Jerold S. American Breed Clubs and Health Initiatives. Ostrander, Elaine A.; Giger, Urs; Lindblad-Toh, Kerstin (编). The Dog and Its Genome. CSHL Press. 2007: 40–44 [April 9, 2011]. ISBN 978-0-87969-781-5. (原始内容存档于2019-08-15).