Federica Paganelli Gabriele Bianchi Dino Giuli A Context Model for Context-Aware System Design Towards the Ambient Intelligence Vision: Experiences in the eTourism Domain. 173-191 2006 conf/EUprojects/2006uaaie Universal Access in Ambient Intelligence Environments http://dx.doi.org/10.1007/978-3-540-71025-7_12 db/conf/EUprojects/uaaie2006.html#PaganelliBG06