9HENDRIK W,TOM N, HOLGER K.Designing a wearable user interface for hands-free interaction in maintenance applications.Proceedings-Fourth Annual IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2006.
10ORLIDGE L A.PIP-enhanced "at system" diagnosis on the flightline.AUTOTESTCON Proceedings, 2001.IEEE Systems Readiness Technology Conference.
