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

@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{IsmeYigi2007,
 author = {Ali Ismen and Cigdem Y{\i}g{\i}n and P{\i}nar Ismen},
 year = {2007},
 title  = {Age, growth, reproductive biology and feed of the common guitarfish (\emph{Rhinobatos rhinobatos} {L}innaeus, 1758) in {I}skenderun {B}ay, the eastern {M}editerranean {S}ea},
 journal = {Fisheries Research},
 volume = {84},
 pages = {263-269}
} 

@Misc{fishbase,
 howpublished = {\url{https://www.fishbase.de/summary/Rhinobatos-rhinobatos.html}}
}