David House Björn Granström Multimodal Speech Synthesis: Improving Information Flow in Dialogue Systems Using 3D Talking Heads. 1-10 2002 conf/aimsa/2002 AIMSA http://link.springer.de/link/service/series/0558/bibs/2443/24430001.htm db/conf/aimsa/aimsa2002.html#HouseG02