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} 

@Book{Kooy2010,
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 publisher = {Cambridge Univ. Press, Cambridge},
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 howpublished = {\url{../../../bib/Kooy2010.html}}
} 

@Article{KopiSwar1998,
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 IN {B}LOEMFONTEIN, {S}OUTH {A}FRICA},
 journal = {Navorsinge and die Nationale Museum Bloemfontein},
 volume = {14(6)},
 pages = {145-159}
} 

@Misc{avibase,
 howpublished = {\url{https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=D209A90C8A90DA51&sec=lifehistory}}
} 

@Article{PrinPres1991,
 doi = {10.1016/0300-9629(91)90122-S},
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}