@article{EngelsHeinLefeldtetal.2012,
  author    = {Svenja Engels and Christine Maira Hein and Nele Lefeldt and Helmut Prior and Henrik Mouritsen},
  title     = {Night-migratory songbirds possess a magnetic compass in both eyes},
  journal   = {PLoS One},
  volume    = {7},
  number    = {(9):e43271},
  doi       = {10.1371/journal.pone.0043271},
  year      = {2012},
}