Iddo Hanniel Gershon Elber Computing the Voronoi cells of planes, spheres and cylinders in R<sup>3</sup>. 47-58 2008 Symposium on Solid and Physical Modeling http://doi.acm.org/10.1145/1364901.1364911 conf/sma/2008 db/conf/sma/spm2008.html#HannielE08