@article{9901,
  author = {Y. Ozaki and Carl Hansen},
  title = {Secular Instabilities of Pure Helium Stars},
  year = {1973},
  journal = {Astronomy and Astrophysics},
  volume = {23},
  chapter = {475},
  pages = {475-478},
  url = {http://adsabs.harvard.edu/full/1973A\%26A....23..475O},
  note = {<p>JILA Pub. 947</p>},
}