Paolo Cignoni Fabio Ganovelli Enrico Gobbetti Fabio Marton Federico Ponchio Roberto Scopigno Adaptive tetrapuzzles: efficient out-of-core construction and visualization of gigantic multiresolution polygonal models. 796-803 2004 23 ACM Trans. Graph. 3 http://doi.acm.org/10.1145/1015706.1015802 db/journals/tog/tog23.html#CignoniGGMPS04