1. Wizard of Oz studies: how and why;Dahlback,1993
2. Sample sizes for usability studies: additional considerations;Lewis;Human Factors,1994
3. Video artifacts for design: bridging the gap between abstraction and detail;Mackay,2000
4. Prototyping an intelligent agent through Wizard of Oz;Maulsby,1993
5. Handbook of Usability Testing;Rubin,1994