@inproceedings{Zhao:2020Wt,
  author = "Zhao, Yidi  and  Christ, Norman H.  and  Feng, Xu  and  Jin, Luchang  and  Tu, Cheng",
  title = "{Calculating the two-photon contribution to $\pi^0 \rightarrow e^+ e^-$ decay amplitude}",
  doi = "10.22323/1.363.0097",
  booktitle = "Proceedings of 37th International Symposium on Lattice Field Theory {\textemdash} PoS(LATTICE2019)",
  year = 2020,
  volume = "363",
  pages = "097"
}