@article{johnson-sketch-review,
	Author = {Gabe Johnson and Mark D. Gross and Jason Hong and Ellen Yi-Luen Do},
	Journal = {Foundations and Trends in Human-Computer Interaction},
	Number = {1},
	Pages = {1-93},
	Title = {Computational Support for Sketching in Design: a Review},
	Volume = {2},
	Year = {2009}}