Monica Tavanti Nguyen Thong Dang Hong-Ha Le Usability Inspection of a 3D Interaction Metaphor. 41-46 2004 conf/rivf/2004 RIVF http://e-ifi.org/rivf/2004/proceedings/ArticlesRIVR_04/p41-46.pdf db/conf/rivf/rivf2004.html#TavantiDL04