@article{miura1969,
  title={The<i>p</i>-<i>n</i>Mass Difference Based on the Reggeized Tadpole Model},
  author={K. Miura and Tsunetoshi Watanabe},
  year={1969},
  journal={Progress of Theoretical Physics},
  doi={10.1143/ptp.41.568},
  url={https://doi.org/10.1143/ptp.41.568}
}