@article{vonManteuffel:20139q,
  author = "von Manteuffel, Andreas  and  Studerus, Cedric",
  title = "{Top quark pairs at two loops}",
  doi = "10.22323/1.151.0059",
  journal = "PoS",
  year = 2013,
  volume = "LL2012",
  pages = "059"
}