@article{Walker-Loud:2011ZQ,
  author = "Walker-Loud, André",
  title = "{Direct lattice calculation of m_d - m_u}",
  doi = "10.22323/1.105.0243",
  journal = "PoS",
  year = 2011,
  volume = "Lattice 2010",
  pages = "243"
}