@article{GIESKEBECKERBOeNINGetal.2005,
  author    = {M. GIESKE and G. BECKER and T. B{\"O}NING and M. LOHSE},
  title     = {Untersuchungen zur Phosphorr{\"u}ckgewinnung aus Kl{\"a}rschlamm},
  journal   = {Korrespondenz Abwasser},
  number    = {4},
  pages     = {431 -- 436},
  year      = {2005},
}