@article{11586,
  author = {David Hummer},
  title = {Non-coherent scattering-VI. Solutions of the transfer problem with a frequency-dependent source function},
  year = {1969},
  journal = {Monthly Notices of the Royal Astronomical Society},
  volume = {145},
  chapter = {95},
  pages = {95-120},
  month = {00/1969},
  url = {http://adsabs.harvard.edu/full/1969MNRAS.145...95H},
  doi = {10.1093/mnras/145.1.95},
  note = {JILA Pub. 534},
}