@article{hara1967,
  title={|Δ<i>I</i>| = 1/2 Rule and<i>K</i>→ 2π Decays},
  author={Yasuo Hara},
  year={1967},
  journal={Progress of Theoretical Physics},
  doi={10.1143/ptp.37.470},
  url={https://doi.org/10.1143/ptp.37.470}
}