Z. Obrenovi? and J. B. Martens, Sketching Interactive Systems with Sketchify, ACM Trans. on CHI, vol.18, issue.1, 2011.
DOI : 10.1007/978-3-642-23768-3_127

B. Moggridge, Designing interactions, 2007.

K. Krippendorff, The semantic turn: A new foundation for design, Boca Raton, 2006.
DOI : 10.4324/9780203299951