@article{10495,
  author = {Ludwig Oster and D. Hilton and W. Sieber},
  title = {Pulsar radiation patterns. I - Basic principles of data reduction and a two-frequency study of PSR 2016 + 28},
  year = {1977},
  journal = {Astronomy and Astrophysics},
  volume = {57},
  pages = {1-8},
  url = {http://articles.adsabs.harvard.edu/full/1977A\%26A....57....1O},
  note = {JILA Pub. 1500},
}