@article{8688,
  author = {P. Schneider and J. Kirk},
  title = {Fermi acceleration at shocks with arbitrary velocity profiles},
  year = {1987},
  journal = {The Astrophysical Journal},
  volume = {323},
  pages = {L87},
  month = {Jan-12-1987},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1987ApJ...323L..87S},
  doi = {10.1086/185063},
}