@article{vonHippel:2012Mb,
  author = "von Hippel, Georg",
  title = "{Radiative improvement of spin and Darwin terms in the NRQCD action}",
  doi = "10.22323/1.164.0154",
  journal = "PoS",
  year = 2012,
  volume = "Lattice 2012",
  pages = "154"
}