Emanuele Danovaro Leila De Floriani Paola Magillo Enrico Puppo Davide Sobrero Neta Sokolovsky The Half-Edge Tree: A Compact Data Structure for Level-of-Detail Tetrahedral Meshes. 334-339 2005 conf/smi/2005 SMI http://doi.ieeecomputersociety.org/10.1109/SMI.2005.47 db/conf/smi/smi2005.html#DanovaroFMPSS05