1. Blondel J, Gosler A, Lebreton JD, McCleery R (es) Population biology of passerine birds: an integrated approach. Springer Berlin Heidelberg New York
2. Boycott JA (1971) Natural history of infectiuous disease. Edward Arnold, London
3. Brown CR, Brown MB (1986) Ectoparasitism as a cost of coloniality in cliff swallows (Hirundo pyrrhonota). Ecology 67: 1206?1218
4. Bryant DM (1975) Breeding biology of house martins in relation to aerial insect abundance. Ecology 117 180?216
5. Burdon JJ (1987) Diseases and plant population biology. Cambridge University Press, Cambridge