BibTex format
@article{PRETZEL:1991:10.1016/0012-365X(91)90015-T,
author = {PRETZEL, O and YOUNGS, D},
doi = {10.1016/0012-365X(91)90015-T},
journal = {DISCRETE MATHEMATICS},
pages = {279--287},
title = {BALANCED GRAPHS AND NONCOVERING GRAPHS},
url = {http://dx.doi.org/10.1016/0012-365X(91)90015-T},
volume = {88},
year = {1991}
}