@inbook{4867,
  author = {Jeremy Hutson},
  title = {Classical Path Methods for Lineshape Cross Sections},
  year = {1992},
  volume = {361},
  number = {NATO ASI Series},
  pages = {57-72},
  publisher = {Springer Netherlands},
  doi = {10.1007/978-94-017-3076-1_3},
}