Rieko Kadobayashi Azman Osman Lim Collaborative Guidance System Using Multi-gaze History and Shared Photograph Collection. 39-46 2008 C5 http://doi.ieeecomputersociety.org/10.1109/C5.2008.16 conf/c5/2008 db/conf/c5/c5-2008.html#KadobayashiL08