@article{4761,
  author = {Bruce Hrivnak and S. Kwok},
  title = {On the possible bipolar nature of 21 micron IRAS sources},
  year = {1991},
  journal = {The Astrophysical Journal},
  volume = {368},
  pages = {564},
  month = {Jan-02-1991},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1991ApJ...368..564H},
  doi = {10.1086/169720},
}