Emanuele Danovaro Leila De Floriani Paola Magillo Enrico Puppo Representing Vertex-Based Simplicial Multi-complexes. 129-149 2000 conf/dagstuhl/2000dig Digital and Image Geometry http://dx.doi.org/10.1007/3-540-45576-0_8 db/conf/dagstuhl/dig2000.html#DanovaroFMP00