@article{osawa1966,
  title={The Scattering Matrix Method in the Linear Chain},
  author={Takeo Osawa and Takeyasu Kotera},
  year={1966},
  journal={Progress of Theoretical Physics Supplement},
  doi={10.1143/ptps.36.120},
  url={https://doi.org/10.1143/ptps.36.120}
}