@book{HaenselNeumannHudel1995,
  author    = {Horst H{\"a}nsel and Werner Neumann and Erich Hudel},
  title     = {Physik : Bd. 3 Atome, Atomkerne, Elementarteilchen},
  volume    = {3},
  isbn      = {3-86025-313-1},
  year      = {1995},
}