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2. Gil Laroya-why you need product designing. Autoblog; Huffpost
3. Vonderembse, M.A., and G.P. White. Operations Management: Concepts, Methods, and Strategies. Danvers, MA: John Wiley & Sons, 2004pp287.
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5. Krishnan, V., and K.T. Ulrich. "Product Development Decisions: A Review of the Literature." Management Science 47, no. 1 (2001):pp21
6. Margaret Thatcher (1992) in Walsh et. al. (1992: 69)