Didier Chincholle Mikael Goldstein Marcus Nyberg Mikael Eriksson Lost or Found? A Usability Evaluation of a Mobile Navigation and Location-Based Service. 211-224 2002 conf/mhci/2002 Mobile HCI http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2411&spage=0211 db/conf/mhci/mhci2002.html#ChincholleGNE02