@article{existenceversusexploitationtheopacityof,
  title = {Existence versus Exploitation: The Opacity of Backbones and Backdoors Under a Weak Assumption},
  author = {Lane A. Hemaspaandra and David E. Narváez},
  year = {2017},
  eprint = {1706.04582},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1706.04582v8},
}