Covering contractible edges in 3-connected graphs. I: Covers of size three are cutsets

@article{Saito1990CoveringCE,
  title={Covering contractible edges in 3-connected graphs. I: Covers of size three are cutsets},
  author={Akira Saito},
  journal={Journal of Graph Theory},
  year={1990},
  volume={14},
  pages={635-643}
}