1. Allinson, C. W., & Hayes, J. (1996). The cognitive style index: A measure of intuition- analysis for organizational research. Journal of Management Studies, 33, 119–135.
2. Bergum, B. O. (1977). Undergraduate self perceptions of creativity and independence. Perceptual and Motor Skills, 44, 187–190.
3. Canemaker, J. (1999). Paper dreams: The art and artists of Disney storyboards. New York: Hyperion.
4. Chen, H. H., & You, M. (2006). Comparison of sketching activities with traditional and digital tools in graphic design. Journal of Design, 11(4), 113–135.
5. Christiaans, H. H. C. M. (1992). Creativity in design: the role of domain knowledge in designing, PhD Thesis. Delft University of Technology, Delft, The Netherlands: Lemma BV.