@misc{indiciaee07f51569caa,
  title = {Time-dependent optical phase and imaginary collision kernels.},
  author = {JE Thomas and PJ Laverty and KD Stokes},
  year = {1989},
  doi = {10.1103/physreva.40.1941},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902351/},
  note = {Source identifier: 9902351}
}