Toshiyuki Masui Koji Tsukada Itiro Siio MouseField: A Simple and Versatile Input Device for Ubiquitous Computing. 319-328 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3205&spage=319 2004 conf/huc/2004 Ubicomp db/conf/huc/ubicomp2004.html#MasuiTS04