@article{FreiseRoettgers2005,
  author    = {Jona Freise and Hanns R{\"u}diger R{\"o}ttgers},
  title     = {Ausgangspunkt Landwirtschaft},
  journal   = {DPS},
  number    = {5},
  pages     = {6 -- 10},
  year      = {2005},
}