@article{Chetyrkin:2013Vc,
  author = "Chetyrkin, Konstantin",
  title = "{R(s) and Z decay in O(alpha_s^4): complete results}",
  doi = "10.22323/1.145.0030",
  journal = "PoS",
  year = 2013,
  volume = "RADCOR2011",
  pages = "030"
}