@article{WiltschkoWiltschko2012,
  author    = {Roswitha Wiltschko and Wolfgang Wiltschko},
  title     = {The magnetite-based receptors in the beak of birds and their role in avian navigation},
  journal   = {Journal of comparative physiology},
  volume    = {199},
  pages     = {89 -- 98},
  doi       = {10.1007/s00359-012-0769-3},
  year      = {2012},
}