Stewart94'

@article{DBLP:journals/dm/Stewart94,
  author    = {Iain A. Stewart},
  title     = {Deciding whether a planar graph has a cubic subgraph is
               NP-complete},
  journal   = {Discrete Mathematics},
  volume    = {126},
  number    = {1-3},
  year      = {1994},
  pages     = {349-357},
  ee        = {http://dx.doi.org/10.1016/0012-365X(94)90277-1},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}