@article{Ottnad:2014vc,
  author = "Ottnad, Konstantin  and  Urbach, Carsten  and  Michael, Chris",
  title = "{$\eta$ and $\eta'$ masses and decay constants from lattice QCD with $N_f=2+1+1$ quark flavours}",
  doi = "10.22323/1.187.0253",
  journal = "PoS",
  year = 2014,
  volume = "LATTICE 2013",
  pages = "253"
}