@inproceedings{oi-ennp-03
, author =      "Kensuke Onishi and Jin-ichi Itoh"
, title =       "Estimation of the necessary number of points in {Riemannian} {Voronoi}"
, booktitle =   "Proc. 15th Canad. Conf. Comput. Geom."
, site =        "Halifax"
, year =        2003
, pages =       "19--24"
}