@article{5135,
  author = {Peter Conti and D. Block and T. Geballe and M. Hanson},
  title = {First detection of ionized helium absorption lines in infrared K band spectra of O-type stars},
  year = {1993},
  journal = {The Astrophysical Journal},
  volume = {406},
  pages = {L21},
  month = {Jan-03-1993},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1993ApJ...406L..21C},
  doi = {10.1086/186777},
}