Pierre Alliez David Cohen-Steiner Yiying Tong Mathieu Desbrun Voronoi-based variational reconstruction of unoriented point sets. 39-48 2007 conf/sgp/2007 Symposium on Geometry Processing http://doi.acm.org/10.1145/1281991.1281997 db/conf/sgp/sgp2007.html#AlliezCTD07