Pedro G. Villanueva, José A. Gallud and Ricardo Tesoriero. WallShare: A Multi-Pointer User Interface. Proceedings of the 1st International Workshop on USer Interface eXtensible Markup Language,UsiXML 2010, ISBN: 978-2-9536757-0-2. pp. 75-82. June 20th, 2010. Berlin, Germany.
Link: https://lilab.isys.ucl.ac.be/bchi/publications/2010/UsiXML2010/Villanueva-UsiXML2010.pdf