@inbook{5157,
  author = {A. Starace},
  title = {Hyperspherical Coordinate Description of Single and Multiphoton Processes in Two-Electron Systems},
  year = {1993},
  chapter = {5},
  pages = {107\textendash142},
  publisher = {World Scientific},
  issn = {9810208774, 9789810208776},
  note = {JILA Pub. 4726},
}