@article{Ahrens2006,
  author    = {Bodo Ahrens},
  title     = {Distance in spatial interpolation of daily rain gauge data},
  journal   = {Hydrology and earth system sciences},
  volume    = {10},
  pages     = {197 -- 208},
  doi       = {10.5194/hess-10-197-2006},
  year      = {2006},
}