1. Pet owner attitudes to pets and people;Berryman;Vet. Record,1985
2. A survey on the question of how well veterinarians are prepared to predict their clients human-animal bond;Catanzaro;J. Am. Vet. Med. Assoc.,1988
3. Object Relations Theory and Personality;Fairbairn,1952
4. Childhood cruelty toward animals among criminals and non-criminals;Kellert,1985
5. Psychology of Personal Constructs;Kelly,1955