@article{9507,
  author = {W. Christiansen},
  title = {Multiple explosions in radio galaxies and the heating of the intergalactic medium},
  year = {1971},
  journal = {Astrophysical Letters},
  volume = {7},
  chapter = {233},
  pages = {233-236},
  note = {JILA Pub. 713},
}