1. Rokeach, M.: The Nature of Human Values. The Free Press, New York (1973)
2. Heskett, J.: Design and the Creation of Value. Edited by Dilnot, C., Boztepe, S. Bloomsbury Academic, London (2017)
3. Porter, M.E.: Competitive Advantage: Creating and Sustaining Superior Performance. Free Press, New York (1985)
4. Zeithaml, V.A.: Consumer perceptions of price, quality and value: a means-end model and synthesis of evidence. J. Mark. 52(3), 2–22 (1988)
5. Coleman, R.: The case for inclusive design - an overview. In: 12th Triennial Congress, International Ergonomics Association and the Human Factors Association of Canada, Toronto, Canada (1994)