\input zb-basic \input zb-ioport \iteman{io-port 70005700} \itemau{De Floriani, Leila; Magillo, Paola; Morando, Franco; Puppo, Enrico} \itemti{Non-manifold multi-tessellation: from meshes to iconic representations of objects} \itemso{IWVF, 654-664 (2001).} \itemcc{} \itemut{} \itemli{doi:10.1007/3-540-45129-3\_60} \end