@Misc{Wiki,
 howpublished = {\url{http://en.wikipedia.org/wiki/Hirundo_rustica}}
} 

@Book{Kooy2010,
 author = {Kooijman, S.A.L.M.},
 year = {2010},
 title  = {Dynamic Energy Budget theory for metabolic organisation},
 publisher = {Cambridge Univ. Press, Cambridge},
 pages = {Table 4.2 (page 150), 8.1 (page 300)},
 howpublished = {\url{../../../bib/Kooy2010.html}}
} 

@Article{LangVans1989,
 author = {M. Languy and C. Vansteenwegen},
 year = {1989},
 title = {INFLUENCE OF PARENTAL AGE ON THE GROWTH OF NESTLING SWALLOWS (\emph{Hirundo rustica})},
 journal = {Ardea},
 volume = {77},
 pages = {227-232}
} 

@Misc{AnAge,
 howpublished = {\url{http://genomics.senescence.info/species/entry.php?species=Hirundo_rustica}}
} 

@Book{Harr1975,
 author = {C. Harrison},
 year = {1975},
 title  = {A field guide to the nests, eggs and nestlings of British and European birds},
 publisher = {Collins, London}
} 

@Article{PrinPres1991,
 doi = {10.1016/0300-9629(91)90122-S},
 author = {R. Prinzinger and A.Pre{\ss}mar and E. Schleucher},
 year = {1991},
 title = {Body temperature in birds},
 journal = {Comp. Biochem. Physiol.},
 volume = {99A(4)},
 pages = {499-506}
}