Laura Burzagli Pier Luigi Emiliani Francesco Gabbanini Ambient Intelligence and Multimodality. 33-42 2007 conf/hci/2007-6 HCI (6) http://dx.doi.org/10.1007/978-3-540-73281-5_4 db/conf/hci/hci2007-6.html#BurzagliEG07