@article{Willner2011,
  author    = {Wolfgang Willner},
  title     = {Unambiguous assignment of relev{\´e}s to vegetation units : the example of the Festuco-Brometea and Trifolio-Geranietea sanguinei},
  journal   = {Tuexenia : Mitteilungen der Floristisch-Soziologischen Arbeitsgemeinschaft},
  volume    = {31},
  pages     = {271 -- 282},
  year      = {2011},
}