@inproceedings{marshall2012,
  author	= {Mark Marshall and Thomas Carter and Jason Alexander and Sriram Subramanian},
  title		= {Ultra-tangibles: Creating Movable Tangible Objects on Interactive Tables},
  booktitle	= {Proceedings of the Conference on Human Factors in Computing Systems},
  year		= {2012},
  series	= {CHI '12},
  pages		= {2185--2188},
  address	= {New York, NY, USA},
  publisher	= {ACM},
}