@article{BOeNINGLOHSEHARTMANN2001,
  author    = {T. B{\"O}NING and M. LOHSE and B. HARTMANN},
  title     = {Was leisten naturnahe Verfahren?},
  journal   = {wwt-awt},
  number    = {5},
  pages     = {18 -- 22},
  year      = {2001},
}