Aristodemos Pnevmatikakis John Soldatos Fotios Talantzis Lazaros Polymenakos Robust multimodal audio-visual processing for advanced context awareness in smart spaces. 3-14 2009 13 Personal and Ubiquitous Computing 1 http://dx.doi.org/10.1007/s00779-007-0169-9 db/journals/puc/puc13.html#PnevmatikakisSTP09