@article{10497,
  author = {Ludwig Oster and W. Sieber},
  title = {Pulsar radiation patterns. III - Objects without synchronized drift across the window},
  year = {1977},
  journal = {Astronomy and Astrophysics},
  volume = {58},
  pages = {303-313},
  url = {http://articles.adsabs.harvard.edu/full/1977A\%26A....58..303O},
  note = {JILA Pub. 1568},
}