Bolshakov, C. V., Chernetsov, N., Mukhin, A., Bulyuk, V. N., Kosarev, V., Ktitorov, P., Leoke, D., & Tsvey, A. (2007).
Time of nocturnal departures in European robins, Erithacus rubecula, in relation to celestial cues, season, stopover duration
and fat stores. Animal Behaviour, 74(4), 855-865. doi:10.1016/j.anbehav.2006.10.024.