@misc{SiebertFeickHoogeveen2005,
  author    = {Stefan Siebert and Sebastian Feick and Jippe Hoogeveen},
  title     = {A digital global map of irrigated areas : an update for Asia},
  booktitle = {Frankfurt hydrology paper ; 1},
  institution = {Geographie},
  series    = {Frankfurt Hydrology Paper},
  number    = {1},
  type      = {workingpaper},
  pages     = {113},
  year        = {2005},
}