@article{SchiffnerWiltschko2014,
  author    = {Ingo Schiffner and Roswitha Wiltschko},
  title     = {Pigeon navigation : different routes lead to Frankfurt},
  journal   = {PLoS One},
  volume    = {9},
  number    = {(11):e112439},
  doi       = {10.1371/journal.pone.0112439},
  year      = {2014},
}