@article{Zimmermann:20141g,
  author = "Zimmermann, Falk  and  Urbach, C.  and  Ottnad, Konstantin",
  title = "{Investigating a mixed action approach for $\eta$ and $\eta'$ mesons in $N_f=2+1+1$ lattice QCD}",
  doi = "10.22323/1.187.0442",
  journal = "PoS",
  year = 2014,
  volume = "LATTICE 2013",
  pages = "442"
}