1. Requirements, models, and prototypes for HCI design;Casaday,1996
2. Cardboard computers: Mocking-it-up or hands-on the future;Ehn,1991
3. Making representations work;Kyng;Communications of the ACM,1995
4. Managing the design of the user interface;Mayhew,1995
5. Paper versus computer implementations as mockup scenarios for heuristic evaluation;Nielsen,1990