@misc{indiciaec33ec1f28d72,
  title = {Do migratory flight paths of raptors follow constant geographical or geomagnetic courses?},
  author = {K. Thorup and M. Fuller and T. Alerstam and M. Hake and N. Kjellen and R. Strandberg},
  year = {2006},
  doi = {10.1016/j.anbehav.2006.01.028},
  url = {https://pubs.usgs.gov/publication/70028896},
  note = {Source identifier: 70028896}
}