@article{7528,
  author = {W. Hagen and R. Stencel and D. Dickinson},
  title = {The circumstellar envelopes and chromospheres of cool giants and supergiants},
  year = {1983},
  journal = {The Astrophysical Journal},
  volume = {274},
  pages = {286},
  month = {Jan-11-1983},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1983ApJ...274..286H},
  doi = {10.1086/161446},
}