@article{Kennedy:2008AS,
  author = "Kennedy, Anthony D.  and  Clark, Michael A.",
  title = "{Speeding up HMC with better integrators}",
  doi = "10.22323/1.042.0038",
  journal = "PoS",
  year = 2008,
  volume = "LATTICE 2007",
  pages = "038"
}