@article{SchiffersTielboerger2006,
  author    = {Katja Schiffers and Katja Tielb{\"o}rger},
  title     = {Ontogenetic shifts in interactions among annual plants},
  doi       = {10.1111/j.1365-2745.2006.01097.x},
  url       = {http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2745.2006.01097.x/pdf},
  year      = {2006},
}