@article{WinklerHeinken2007,
  author    = {Eckart Winkler and Thilo Heinken},
  title     = {Spread of an ant-dispersed annual herb : an individual-based simulation study on population development of Melampyrum pratense L.},
  url       = {http://www.sciencedirect.com/science/journal/03043800},
  year      = {2007},
}