@article{shibata1971,
  title={Equivalence of<i>s</i>-<i>d</i>Exchange, Anderson and Wolff Models},
  author={Fumiaki Shibata and Kazushige Machida and Hiroshi Mamada},
  year={1971},
  journal={Progress of Theoretical Physics},
  doi={10.1143/ptp.45.994},
  url={https://doi.org/10.1143/ptp.45.994}
}