@article{NaafWulf2011,
  author    = {Tobias Naaf and Monika Wulf},
  title     = {Traits of winner and loser species indicate drivers of herb layer changes over two decades in forests of NW Germany},
  journal   = {Journal of vegetation science},
  volume    = {22},
  number    = {3},
  pages     = {516 -- 527},
  doi       = {10.1111/j.1654-1103.2011.01267.x},
  year      = {2011},
}