Charlotte Magnusson Konrad Tollmar Stephen A. Brewster Tapani Sarjakoski L. Tiina Sarjakoski Samuel Roselier Exploring future challenges for haptic, audio and visual interfaces for mobile maps and location based services. 8 2009 LocWeb http://doi.acm.org/10.1145/1507136.1507144 conf/locweb/2009 db/conf/locweb/locweb2009.html#MagnussonTBSSR09