Dragan Tubic Patrick Hébert Jean-Daniel Deschênes Denis Laurendeau A Unified Representation for Interactive 3D Modeling. 175-182 2004 conf/3dpvt/2004 3DPVT http://doi.ieeecomputersociety.org/10.1109/TDPVT.2004.1335192 db/conf/3dpvt/3dpvt2004.html#TubicHDL04