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@Book{Kooy2010,
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@Article{KillTie2014,
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} 

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

@Misc{voliere,
 howpublished = {\url{https://voliere-info.nl/zebravink/}}
} 

@Article{PrinPres1991,
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@Article{VlecHoyt1979,
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}