Ariff, N. S. N. A., P. Badke-Schaub, and O. Eris. “Conversations Around Design Sketches: Use of Communication Channels for Sharing Mental Models During Concept Generation”. Design and Technology Education: An International Journal, vol. 17, no. 3, Oct. 2012, pp. 27-36, https://openjournals.ljmu.ac.uk/DesignTechnologyEducation/article/view/1677.