@article{Pena:2008mY,
  author = "Pena, Carlos",
  title = "{Non-perturbative renormalisation of four-fermion operators in $N_f=2$ QCD}",
  doi = "10.22323/1.042.0368",
  journal = "PoS",
  year = 2008,
  volume = "LATTICE 2007",
  pages = "368"
}