@techreport{R-91-24,
TITLE = {Polyhedral Approximation of Bivariate Functions},
AUTHOR = {Per-Olof Fj{\"a}llstr{\"o}m},
YEAR = {1991},
NUMBER = {R-91-24},
INSTITUTION = ida,
ADDRESS = idaaddr,
ABSTRACT = {},
IDANR = {LiTH-IDA-R-91-24},
NOTE = {Also in Proc. of Third Canadian Conference on Computational Geometry, Vancouver, B.C., Canada, August 5-10, 1991}