Serge Linckels Stephan Repp Naouel Karam Christoph Meinel The virtual tele-tASK professor: semantic search in recorded lectures. 50-54 2007 conf/sigcse/2007 SIGCSE http://doi.acm.org/10.1145/1227310.1227330 db/conf/sigcse/sigcse2007.html#LinckelsRKM07