2-factors with Prescribed and Proscribed Edges

@article{Aldred20052factorsWP,
  title={2-factors with Prescribed and Proscribed Edges},
  author={Robert E. L. Aldred and Derek A. Holton and John Sheehan},
  journal={Journal of Graph Theory},
  year={2005},
  volume={49},
  pages={48-58}
}