@article{Sommer:2019hs,
  author = "Sommer, Rainer  and  Onogi, T.  and  Horsley, R.",
  title = "{The 2019 lattice FLAG $a_S$ average}",
  doi = "10.22323/1.365.0020",
  journal = "PoS",
  year = 2019,
  volume = "ALPHAS2019",
  pages = "020"
}