Raphael Hayem Tancrede Fourmaintraux Keran Petit Nicolas Rauber Olga Kisseleva Avatars: New Fields of Implication. 406-410 1998 conf/vw/1998 Virtual Worlds http://dx.doi.org/10.1007/3-540-68686-X_39 db/conf/vw/vw1998.html#HayemFPRK98