@proceedings{8216,
  author = {J. Shull},
  title = {Collisional Ionization. Astrophysical and Fusion Applications},
  year = {1985},
  journal = {Electron impact ionization},
  pages = {327},
  publisher = {Springer-Verlag},
  issn = {0387817786, 9780387817781},
  note = {JILA Pub. 2639},
}