Ken Hinckley François Guimbretière Patrick Baudisch Raman Sarin Maneesh Agrawala Edward Cutrell The springboard: multiple modes in one spring-loaded control. 181-190 2006 conf/chi/2006 CHI http://doi.acm.org/10.1145/1124772.1124801 db/conf/chi/chi2006.html#HinckleyGBSAC06