Harry Zhang Christopher Schreiner Keshu Zhang Kari Torkkola Naturalistic use of cell phones in driving and context-based user assistance. 273-276 2007 Mobile HCI http://doi.acm.org/10.1145/1377999.1378018 conf/mhci/2007 db/conf/mhci/mhci2007.html#ZhangSZT07