1. Gray, T. (2004) A Brief History of Animals in Space. NASA Publishing.
2. Savage, J., et al. (2000, October). Animal-machine interfaces. In Wearable Computers, The Fourth International Symposium on .IEEE. 191--192.
3. Resner, B. (2001). Rover@home. Doctoral dissertation, Masters Thesis, MIT, Netherlands, Cambridge, Massachusetts, USA.
4. Ping, L. S et al. (2003) Cheok.Toouchy.Internet: a cybernetic system for human-pet interaction through the Internet. ACM SIGGRAPH.
5. Ping, L. S. et al. (2004) A human-pet interactive entertainment system over the internet, in Entertainment Computing. ICEC 2004. 509--512.