@book{BontrupMarquardt2022,
  author    = {Heinz-Josef Bontrup and Ralf-Michael Marquardt},
  title     = {Die Zukunft der gro{\"s}en Energieversorger},
  editor    = {Heinz-Josef Bontrup and Ralf-Michael Marquardt},
  isbn      = {978-3-86496-865-5},
  year      = {2022},
}