Jonathan J. Cadiz Anand Balachandran Elizabeth Sanocki Anoop Gupta Jonathan Grudin Gavin Jancke Distance learning through distributed collaborative video viewing. 135-144 2000 CSCW http://doi.acm.org/10.1145/358916.358984 db/conf/cscw/cscw2000.html#CadizBSGGJ00