@article{okamoto1956,
  title={Relation between the Quadrupole Moments and the Widths of the Giant Resonance of Photonuclear Reaction},
  author={Kazuto Okamoto},
  year={1956},
  journal={Progress of Theoretical Physics},
  doi={10.1143/ptp.15.75},
  url={https://doi.org/10.1143/ptp.15.75}
}