@conference {1616257, title = {Understanding Multi-touch Manipulation for Surface Computing}, booktitle = {INTERACT {\textquoteright}09: Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction}, year = {2009}, pages = {236{\textendash}249}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, address = {Berlin, Heidelberg}, isbn = {978-3-642-03657-6}, doi = {http://dx.doi.org/10.1007/978-3-642-03658-3_31}, author = {North, Chris and Dwyer, Tim and Lee, Bongshin and Fisher, Danyel and Isenberg, Petra and Robertson, George and Inkpen, Kori} }