1. Bartlett, C., 1976. Heritabilities and genetic correlations between hip dysplasia and temperament traits of seeing-eye dogs. Masters thesis, Rutgers Univ., New Brunswick, NJ, USA.
2. The Dog: Its Behaviour, Nutrition and Health;Case,1999
3. Kompendium Mentalitet;Fält,1997
4. Gilmour, A., Gogel, B., Cullis, B., Welham, S., Thompson, R., 2002. ASREML User Guide Release 1.0. VSN International Ltd, 5 The Waterhouse, Waterhouse Street, Hemel Hempsted, HP1 1ES, UK.
5. Genetic and environmental factors affecting the suitability of dogs as guide dogs for the blind;Goddard;Theor. Appl. Genet.,1982