@misc{pin-rez-98-cite,
  author = {G. Pinto and P. de Rezende},
  title = {Additively Weighted {Voronoi} Diagram in the Oriented Projective Plane},
  url = {http://citeseer.nj.nec.com/article/pinto98additively.html},
  howpublished = {WWW document},
  year = 1998,
  comment = {Uses oriented projective geometry.},
  altkeys = {Citeseer:pinto98additively}
}