@article{9816,
  author = {R. Steinitz and R. Shine},
  title = {On the dependence of the two-level source function on its own radiation field},
  year = {1973},
  journal = {Monthly Notices of the Royal Astronomical Society},
  volume = {162},
  chapter = {197},
  pages = {197-206},
  url = {http://adsabs.harvard.edu/full/1973MNRAS.162..197S},
  doi = {10.1093/mnras/162.3.197},
  note = {<p>JILA Pub. 949</p>},
}