@article{7164,
  author = {R. Ballagh and John Cooper and W. Sandle},
  title = {Effective two-state behaviour of a collisionally perturbed Zeeman degenerate atomic transition and its application to optical bistability},
  year = {1981},
  journal = {Journal of Physics B: Atomic and Molecular Physics},
  volume = {14},
  pages = {3881-3890},
  month = {Apr-10-1983},
  issn = {0022-3700},
  doi = {10.1088/0022-3700/14/20/012},
}