Lauro C. Galvão Antonio Galvão Naclério Novaes José E. Souza de Cursi João C. Souza A multiplicatively-weighted Voronoi diagram approach to logistics districting. 93-114 2006 33 Computers & OR http://dx.doi.org/10.1016/j.cor.2004.07.001 db/journals/cor/cor33.html#GalvaoNCS06