@inproceedings{echtler2008shadows,
 author = {Florian Echtler and Manuel Huber and Gudrun Klinker},
 title = {Shadow tracking on multi-touch tables},
 booktitle = {AVI '08: Proceedings of the working conference on Advanced Visual Interfaces},
 year = {2008},
 isbn = {978-605581415},
 pages = {388--391},
 location = {Napoli, Italy},
 doi = {http://doi.acm.org/10.1145/1385569.1385640},
 publisher = {ACM},
 address = {New York, NY, USA},
}