BibTex format
@article{Pretzel:2003:10.1016/S0012-365X(03)00160-2,
author = {Pretzel, O},
doi = {10.1016/S0012-365X(03)00160-2},
journal = {DISCRETE MATHEMATICS},
pages = {227--240},
title = {On reorienting graphs by pushing down maximal vertices - II},
url = {http://dx.doi.org/10.1016/S0012-365X(03)00160-2},
volume = {270},
year = {2003}
}