@article{4495,
  author = {Gary Ferland and K. Korista and B. Peterson},
  title = {Optically thin thermal emission as the origin of the big bump in the spectra of active galactic nuclei},
  year = {1990},
  journal = {The Astrophysical Journal},
  volume = {363},
  pages = {L21},
  month = {Jan-11-1990},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1990ApJ...363L..21F},
  doi = {10.1086/185856},
}