Hao Jiang Alain Viel Meekal Bajaj Robert A. Lue Chia Shen CThru: exploration in a video-centered information space for educational purposes. 1247-1250 2009 CHI http://doi.acm.org/10.1145/1518701.1518887 conf/chi/2009 db/conf/chi/chi2009.html#JiangVBLS09