@article{HuenerbeinHamannRueteretal.2005,
  author    = {Karen von H{\"u}nerbein and Hans-Joachim Hamann and Eckhard R{\"u}ter and Wolfgang Wiltschko},
  title     = {A GPS-based system for recording the flight paths of birds},
  journal   = {Naturwissenschaften},
  volume    = {87},
  number    = {6},
  pages     = {278 -- 279},
  doi       = {10.1007/s001140050721},
  year      = {2005},
}