1. Wood, S.L.: Function driven design selection of plastic injection molding features. In: 1996 ASME Design for Manufacturing Conference, DFM A W2, Los Angeles, CA
2. Reisberg, D.: Cognition: Exploring the Science of the Mind, 5th edn. W.W. Norton & Company, Norton (2012)
3. Wertheimer, M.: Productive Thinking. Harper & Brothers Publishers, New York (1959)
4. Hut, P.M.: House of Quality Matrix. The Project Management Hut, 29 June 2008.
http://www.pmhut.com/house-of-quality-matrix
5. Duncker, K.: On Problem Solving, vol. 58. Psychological Monographs, Washington, DC (1945). Whole no. 270