1. Bird Migration;Alerstam,1990
2. The development of bird migration theory;Alerstam;Journal of Avian Biology,1998
3. Optimal bird migration: the relative importance of time, energy and safety;Alerstam,1990
4. Bayly, N. J. 2003. Fuelling ecology and migratory strategies: a study of two Acrocephalus warblers. D.Phil. thesis, University of Sussex.
5. Flight-range estimates for small trans-Sahara migrants;Biebach;Ibis,1992