Michael J. O'Grady Juan Ye Gregory M. P. O'Hare Simon A. Dobson Richard Tynan Rem W. Collier Conor Muldoon A Middleware for Implicit Interaction. 143-161 2009 Instinctive Computing Workshop http://dx.doi.org/10.1007/978-3-642-19757-4_9 conf/instinctive/2009 db/conf/instinctive/instinctive2009.html#OGradyYODTCM09