1. Adams, D. W. H. (1962): Radar observations of bird migration in Cyprus. — Ibis 104, p. 133–146.
2. Bird, C. G. (1937): Some notes from Port Etienne. — Ibis, p. 721–731.
3. Deelder, C. L. (1949): On the autumn migration of the scandinavian Chaffinch. — Ardea 37, p. 1–88.
4. Dobben, W. H. van (1953): Bird migration in the Netherlands. — Ibis 95, p. 212–234.
5. - (1955): Nature and strenght of the attraction exerted by leading lines. — Acta Congr. Int. Orn., Basel, p. 165–166.