@article{nagasaki1954,
  title={On the Excited States of Even-even Nuclei},
  author={Masayuki Nagasaki and T. Tamura},
  year={1954},
  journal={Progress of Theoretical Physics},
  doi={10.1143/ptp.12.248},
  url={https://doi.org/10.1143/ptp.12.248}
}