%0 Journal Article
%A M. Sharir
%A D. Halperin
%T New Bounds for Lower Envelopes in Three Dimensions, with Applications to Visibility in Terrains.
%J Discrete & computational geometry
%D 1994
%P 313-326
%V 12
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DCG_1994__12_1_131334/
%F DCG_1994__12_1_131334