@article{DBLP:journals/dm/Olariu89,
author = {Stephan Olariu},
title = {Weak bipolarizable graphs},
journal = {Discrete Mathematics},
volume = {74},
number = {1-2},
year = {1989},
pages = {159-171},
ee = {http://dx.doi.org/10.1016/0012-365X(89)90208-2},
bibsource = {DBLP, http://dblp.uni-trier.de}
}