David J. Roberts Robin Wolff John Rae Anthony Steed Rob Aspin Moira McIntyre Adriana Pena Oyewole Oyekoya William Steptoe Communicating Eye-gaze Across a Distance: Comparing an Eye-gaze enabled Immersive Collaborative Virtual Environment, Aligned Video Conferencing, and Being Together. 135-142 2009 VR http://dx.doi.org/10.1109/VR.2009.4811013 conf/vr/2009 db/conf/vr/vr2009.html#RobertsWRSAMPOS09