@article{GDZPPN000364037,
title = {The Upper Envelope of Piecewise Linear Functions and the Boundary of a Region Enclosed by Convex Plates: Combinatorial Analysis.},
journal = {Discrete \& computational geometry},
volume = {4},
year = {1989},
pages = {291-310},
zbl = {0734.05054},
url = {http://dml.mathdoc.fr/item/GDZPPN000364037}
}
Sharir, Micha; Pach, Janos. The Upper Envelope of Piecewise Linear Functions and the Boundary of a Region Enclosed by Convex Plates: Combinatorial Analysis.. Discrete & computational geometry, Tome 4 (1989) pp. 291-310. http://gdmltest.u-ga.fr/item/GDZPPN000364037/