1. A.J. Kim, “Community Building on the Web: Secret Strategies for Successful Online Communities,” Addison-Wesley (forthcoming).
2. http://www.digitalcitv.com/
3. Lect Notes Comput Sci;P. Besselaar van den,1998
4. http://www.hel.fi/infocities/
5. W. Jepson and S. Friedman, “The Virtual World Data Server & The Virtual Los Angeles Project,”
http://www.aud.ucla/-biWACM97m
.