@article{MayGrimmJeltsch2009,
  author    = {Felix May and Volker Grimm and Florian Jeltsch},
  title     = {Reversed effects of grazing on plant diversity : the role of below-ground competition and size symmetry},
  doi       = {10.1111/j.1600-0706.2009.17724.x},
  url       = {http://www3.interscience.wiley.com/journal/118531693/home},
  year      = {2009},
}