1. Spyridakis, J.H., Wei, C., Barrick, J., Cuddihy, E., Maust, B.: Internet-based research. Providing a foundation for web-design guidelines. IEEE Transactions on Professional Communication 48, 242–260 (2005)
2. Nielsen, J., Loranger, H.: Prioritizing Web usability. New Riders, Berkeley (2006)
3. ISO: Ergonomic requirements for office work with visual display terminals (VDTs)-Part 11: Guidance on usability (ISO 9241-11) (1998)
4. Hornbæk, K.: Current practice in measuring usability: Challenges to usability studies and research. International Journal of Human-Computer Studies 64, 79–102 (2006)
5. Sudman, S., Bradburn, N., Schwarz, N.: Thinking about answers: The application of cognitive processes to survey methodology. Jossey-Bass, San Francisco (1995)