Marja-Riitta Koivunen Ora Lassila Juha Ahvo Minna Rankinen Sirpa Riihiaho Bodil Riihinen ActorStudio: An Interactive User Interface Editor. 303-314 1993 conf/vchci/1993 VCHCI db/conf/vchci/vchci1993.html#KoivunnenLARRR93