Media type: E-Article Title: Intelligent Virtual Agents: Constraints-Based Complex Behavior in Rich Environments Contributor: Allbeck, Jan M.; Kress-Gazit, Hadas imprint: Springer Berlin Heidelberg, 2010 Published in: Intelligent Virtual Agents Language: Not determined DOI: 10.1007/978-3-642-15892-6_1 ISSN: 0302-9743; 1611-3349 Origination: Footnote: