Themis Panayiotopoulos Jonathan Gratch Ruth Aylett Daniel Ballin Patrick Olivier Thomas Rist Intelligent Virtual Agents, 5th International Working Conference, IVA 2005, Kos, Greece, September 12-14, 2005, Proceedings 3661 3-540-28738-8 IVA 2005 Lecture Notes in Computer Science Springer db/conf/iva/iva2005.html