Gordo, Oscar; Brotons, Lluís; Ferrer, Xavier; Comas, Pere (enero de 2005). «Do changes in climate patterns in wintering areas affect the timing of the spring arrival of trans-Saharan migrant birds?». Global Change Biology11 (1): 12-21. doi:10.1111/j.1365-2486.2004.00875.x.
Riley, Helen T.; Bryant, David M; Carter, Royston E; Parkin, David T. (febrero de 1995). «Extra-pair fertilizations and paternity defence in house martins, Delichon urbica». Animal Behaviour49 (2): 495-509. doi:10.1006/anbe.1995.0065.
Kaczmarek, S. (1993;). «Ectoparasites from nests of swallows Delichon urbica and Hirundo rustica collected in autumn». Wiad Parazytol.(en polaco)39 (4): 407-9. PMID8128730.