@article{8948,
  author = {Juri Toomre},
  title = {Helioseismology: Theoretical Background and Challenges},
  year = {1988},
  journal = {Bulletin of the American Astronomical Society},
  volume = {20},
  chapter = {729},
  month = {1988-01},
  url = {http://adsabs.harvard.edu/full/1988BAAS...20..729T},
}