@inproceedings{echtler09inverse, author = {Echtler, Florian and Dippon, Andreas and T\"onnis, Marcus and Klinker, Gudrun}, title = "{Inverted FTIR: Easy Multitouch Sensing for Flatscreens}", booktitle = "{TIS '09: Proceedings of the Conference on Tabletops and Interactive Surfaces (to appear)}", month = dec, year = 2009, keywords = {multi-touch, FTIR, sensor, flatscreen} }