1. Social and communication behaviour of companion dogs;Bradshaw,1995
2. Nonverbal Communication: The Unspoken Dialogue;Burgoon,1996
3. The analysis of factors influencing auditory cognition of verbal commands in dogs (Canis familiaris);Fukuzawa,2000
4. Auditory cognition of phonemic inflected commands in dogs;Fukuzawa,2002
5. Fukuzawa, M., 2002. An evaluation of artificial machine-created commands on retrieve training in the early stages, and investigation of command factors influencing cognition of verbal commands in dogs. M.Sc. Thesis. Azabu University, Japan.