@inproceedings{kratz2009unobtrusive,
	Author = {Kratz, Sven and Rohs, Michael},
	Booktitle = {Workshop Multitouch and Surface Computing at CHI'09},
	Location = {Boston, MA, USA},
	Month = {apr},
	Title = {Unobtrusive Tabletops: Linking Personal Devices with Regular Tables},
	Year = {2009}}