@article{10496,
  author = {Ludwig Oster and D. Hilton and W. Sieber},
  title = {Pulsar radiation patterns. II - Objects with synchronized drift across the window},
  year = {1977},
  journal = {Astronomy and Astrophysics},
  volume = {57},
  pages = {323-330},
  url = {http://adsabs.harvard.edu/full/1977A\%26A....57..323O},
  note = {JILA Pub. 1567},
}