1. Bitner, M. J., Servicescapes: The impact of physical surroundings on customers and employees. Journal of Marketing, 55(jan):10-25.
2. Booz, A., Hamilton. New Product Management for the 1980s. New York: Booz Allen & Hamilton, Inc. (1982)
3. Bowers, M. R. New Product Development in Service Industries. Doctoral dissertation, Texas A&M University. (1985)
4. Bruce, M., Bessant, J. Design in business: Strategic innovation through design. Design Council, UK. (2002)
5. Edvardsson, B., Gustafsson, A., Johnson, M., D., Sandén, B. New service development and innovation in the new economy. Lund: Studentlitteratur. (2000)