@article{BleekerSchmitzRistow2007,
  author    = {Walter Bleeker and Ulf Schmitz and Michael Ristow},
  title     = {Interspecific hybridisation between alien and native plant species in Germany and its consequences for native biodiversity},
  doi       = {10.1016/j.biocon.2007.02.004},
  url       = {http://www.sciencedirect.com/science/journal/00063207},
  year      = {2007},
}