@article{4938,
  author = {Yueming Xu and Richard McCray and Ernesto Oliva and S. Randich},
  title = {Hydrogen recombination at high optical depth and the spectrum of SN 1987A},
  year = {1992},
  journal = {The Astrophysical Journal},
  volume = {386},
  pages = {181},
  month = {Jan-02-1992},
  issn = {0004-637X},
  url = {http://adsabs.harvard.edu/full/1992ApJ...386..181X},
  doi = {10.1086/171003},
}