On Restricted Two-Factors

@article{Hell1988OnRT,
  title={On Restricted Two-Factors},
  author={Pavol Hell and David G. Kirkpatrick and Jan Kratochv{\'i}l and Igor Kr{\'i}z},
  journal={SIAM J. Discrete Math.},
  year={1988},
  volume={1},
  pages={472-484}
}