Esther Meng-Yoke Tan Dion Hoe-Lian Goh Yin Leng Theng Schubert Foo An analysis of services for the mobile tourist. 490-494 2007 Mobility Conference http://doi.acm.org/10.1145/1378063.1378142 conf/mobility/2007 db/conf/mobility/mobility2007.html#TanGTF07