@article{4387,
  author = {G. Agarwal and S. Ravi and John Cooper},
  title = {dc-field-coupled autoionizing states for laser action without population inversion},
  year = {1990},
  journal = {Physical Review A},
  volume = {41},
  pages = {4721-4726},
  month = {Jan-05-1990},
  issn = {1050-2947},
  doi = {10.1103/PhysRevA.41.4721},
}