1. Hummels, C., Frens, J.: Designing for the unknown: A design process for the future generation of highly interactive systems and products 4, 204–209 (2008)
2. Hummels, C., Frens, J.: The reflective transformative design process. In: CHI 2009, pp. 2655–2658. ACM, Boston (2009)
3. Hummels, C., Vinke, D.: Eindhoven Designs, vol. 2. Eindhoven University of Technology, Edinhoven (2009)
4. Hummels, C., Vinke, D., Frens, J., Hu, J.: Competency-centered Education for Designing Interactive and Intelligent Products. Creation and Desion (to appear, 2011)
5. Lecture Notes in Computer Science;B. Vlist van der,2008