@inproceedings{Haefeli:2005i1,
  author = "Haefeli, Christoph",
  title = "{The pion mass in finite volume to two loops }",
  doi = "10.22323/1.020.0059",
  booktitle = "Proceedings of XXIIIrd International Symposium on Lattice Field Theory {\textemdash} PoS(LAT2005)",
  year = 2005,
  volume = "020",
  pages = "059"
}