Mario Gutiérrez Alejandra García-Rojas Daniel Thalmann Frédéric Vexo Laurent Moccozet Nadia Magnenat-Thalmann Michela Mortara Michela Spagnuolo An ontology of virtual humans. 207-218 2007 23 The Visual Computer 3 http://dx.doi.org/10.1007/s00371-006-0093-4 db/journals/vc/vc23.html#GutierrezGTVMMMS07