Lisa Anthony Jacob O. Wobbrock A lightweight multistroke recognizer for user interface prototypes. 245-252 2010 Graphics Interface http://portal.acm.org/citation.cfm?id=1839258&CFID=37966912&CFTOKEN=40351478 conf/graphicsinterface/2010 db/conf/graphicsinterface/graphicsinterface2010.html#AnthonyW10