@article{6827,
  author = {R. Williams and J. Kelly and J. Hartman and Steven Sharpe and M. Taubman and John Hall and Federico Capasso and Claire Gmachl and D. Sivco and James Baillargeon and Alfred Cho},
  title = {Kilohertz linewidth from frequency-stabilized mid-infrared quantum cascade lasers},
  year = {1999},
  journal = {Optics Letters},
  volume = {24},
  pages = {1844},
  month = {Jan-01-1999},
  issn = {0146-9592},
  doi = {10.1364/OL.24.001844},
}