@inproceedings{Gagliardi:2022Wc,
  author = "Gagliardi, Giuseppe  and  Frezzotti, Roberto  and  Lubicz, Vittorio  and  Martinelli, Guido  and  Sanfilippo, Francesco  and  Simula, Silvano",
  title = "{Lattice determination of the pion mass difference $M_{\pi^{+}} - M_{\pi^{0}}$ at order $\mathcal{O}(\alpha_{em})$ and $\mathcal{O}( (m_{d}-m_{u})^{2})$ including disconnected diagrams.}",
  doi = "10.22323/1.396.0255",
  booktitle = "Proceedings of The 38th International Symposium on Lattice Field Theory {\textemdash} PoS(LATTICE2021)",
  year = 2022,
  volume = "396",
  pages = "255"
}