@inproceedings{Ottnad:2012/r,
  author = "Ottnad, Konstantin  and  Urbach, C.  and  Michael, Chris  and  Reker, Siebren",
  title = "{Masses of eta, eta' Mesons from 2+1+1 Twisted Mass Lattice QCD}",
  doi = "10.22323/1.139.0336",
  booktitle = "Proceedings of XXIX International Symposium on Lattice Field Theory  {\textemdash} PoS(Lattice 2011)",
  year = 2012,
  volume = "139",
  pages = "336"
}