Iddo Hanniel Ramanathan Muthuganapathy Gershon Elber Myung-Soo Kim Precise Voronoi cell extraction of free-form rational planar closed curves. 51-59 2005 conf/sma/2005 Symposium on Solid and Physical Modeling http://doi.acm.org/10.1145/1060244.1060251 db/conf/sma/spm2005.html#HannielMEK05