@article{10196,
  author = {D. Mihalas and P. Kunasz and David Hummer},
  title = {Solution of the comoving frame equation of transfer in spherically symmetric flows. I - Computational method for equivalent-two-level-atom source functions},
  year = {1975},
  journal = {The Astrophysical Journal},
  volume = {202},
  pages = {465},
  month = {Jan-12-1975},
  issn = {0004-637X},
  url = {http://adsabs.harvard.edu/full/1975ApJ...202..465M},
  doi = {10.1086/153996},
}