@ARTICLE {2300,
author={F.   Silva and A. Gomes},
doi={},
journal={Lecture Notes in Computer Science},
title={Oversimplified Euler Operators for a Non-Oriented, Non-manifold B-Rep Data Structure},
year={2005},
month={November},
volume={3804},
number={1},
pages={25-34},
ISSN={0302-9743}
}