Patrick Gebhard Martin Klesen Thomas Rist Coloring Multi-character Conversations through the Expression of Emotions. 128-141 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3068&spage=128 2004 conf/ads/2004 ADS db/conf/ads/ads2004.html#GebhardKR04