1. Shaffer, E.: The Institutionalization of Usability: A Step-By-Step Guide. Addison Wesley, New York (2004)
2. Trenner, L., Bawa, J. (eds.): The Politics of Usability: A Practical Guide to Designing Usable Systems in Industry. Springer, Berlin (1998)
3. Lavie, T., Tractinsky, N.: Assessing Dimensions of Perceived Visual Aesthetics of Web Sites. International Journal Human-Computer Studies 60, 269–298 (2004)
4. International Organization for Standardization: Ergonomic requirements for office work with visual display terminals (VDTs) – Part 11: Guidance on usability (ISO Reference No. 9241-11:1998(E)) (1998)
5. Vetrov, Y.: Applied UX Strategy, Part 1: Maturity Models. UX Matters (2013),
http://www.uxmatters.com/mt/archives/2013/12/applied-ux-strategy-part-1-maturity-models.php