Erwin Aitenbichler Fernando Lyardet Gerhard Austaller Jussi Kangasharju Max Mühlhäuser Engineering intuitive and self-explanatory smart products. 1632-1637 2007 conf/sac/2007 SAC http://doi.acm.org/10.1145/1244002.1244348 db/conf/sac/sac2007.html#AitenbichlerLAKM07