@article{GDZPPN000365858,
title = {The Upper Envelope of Voronoi Surfaces and Its Applications.},
journal = {Discrete \& computational geometry},
volume = {10},
year = {1993},
pages = {267-292},
zbl = {0770.68111},
url = {http://dml.mathdoc.fr/item/GDZPPN000365858}
}
Kedem, K.; Sharir, M.; Huttenlocher, D.P. The Upper Envelope of Voronoi Surfaces and Its Applications.. Discrete & computational geometry, Tome 10 (1993) pp. 267-292. http://gdmltest.u-ga.fr/item/GDZPPN000365858/