Pierre Dragicevic Gonzalo Ramos Jacobo Bibliowitcz Derek Nowrouzezahrai Ravin Balakrishnan Karan Singh Video browsing by direct manipulation. 237-246 2008 CHI http://doi.acm.org/10.1145/1357054.1357096 conf/chi/2008 db/conf/chi/chi2008.html#DragicevicRBNBS08