1. Virtual or real?: the mind in cyberspace;Cartwright;The Futurist,1994
2. The travel experience: technology as threat or opportunity?;McClure,1994
3. Knowledge-based augmented reality;Feiner;Communications of the ACM,1993
4. Virtual reality check;Sheridan;Technology Review,1993
5. Can tourism be replaced by virtual reality technology;Musil,1994