SmartMoveX on a Graph - An Inexpensive Active Badge Tracker. - John Krumm; Lyndsay Williams; Greg Smith (UbiComp, 2002)

SenseCam: A Retrospective Memory Aid. - Steve Hodges 001; Lyndsay Williams; Emma Berry; Shahram Izadi; James Srinivasan; Alex Butler; Gavin Smyth; Narinder Kapur; Kenneth R. Wood (UbiComp, 2006)