@article{Luhmann1997,
  author    = {Luhmann, Hans-Jochen},
  title     = {Is the Berlin approach sufficient for the climate protocol in Kyoto?},
  journal   = {International environmental affairs},
  volume    = {9},
  number    = {4},
  pages     = {309 -- 320},
  year      = {1997},
  language  = {en}
}