Hayong Shin Seyoun Park Eonjin Park Deok-Soo Kim Voronoi Diagram of a Polygon in chessboard Metric and Maskless lithographic Applications. 357-371 2008 18 Int. J. Comput. Geometry Appl. 4 http://dx.doi.org/10.1142/S0218195908002672 db/journals/ijcga/ijcga18.html#ShinPPK08