Nicola Bicocchi Gabriella Castelli Marco Mamei Alberto Rosi Franco Zambonelli Supporting location-aware services for mobile users with the whereabouts diary. 6 2008 MOBILWARE http://doi.acm.org/10.1145/1361492.1361500 conf/mobilware/2008 db/conf/mobilware/mobilware2008.html#BicocchiCMRZ08