@article{SchSpe-DCG-99,
title = {Angular properties of Delaunay diagrams in any dimension},
author = {Dominique Schmitt and Jean-Claude Spehner},
journal = {Discrete & Computational Geometry},
volume = {21},
number = {1},
pages = {17--36},
month = {Jan},
year = {1999},
url = {http://link.springer.de/link/service/journals/00454/bibs/21n1p17.html}}