Pretzel87'

BibTeX

@article{DBLP:journals/dm/Pretzel87,
  author    = {Oliver Pretzel},
  title     = {A non-covering graph of girth six},
  journal   = {Discrete Mathematics},
  volume    = {63},
  number    = {2-3},
  year      = {1987},
  pages     = {241-244},
  ee        = {http://dx.doi.org/10.1016/0012-365X(87)90012-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}