@article{4821,
  author = {M. Ashfold and J. Prince},
  title = {Third harmonic generation in molecular gases},
  year = {1991},
  journal = {Molecular Physics},
  volume = {73},
  pages = {297-315},
  month = {Oct-06-1991},
  issn = {0026-8976},
  url = {http://www.tandfonline.com/doi/abs/10.1080/00268979100101211},
  doi = {10.1080/00268979100101211},
}