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

@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{MollEzcu2002,
 doi = {10.1071/MF01074},
 author = {H. F. Mollet and J. M. Ezcurra and J. B. O'Sullivan},
 year = {2002},
 title  = {Captive biology of the pelagic stingray, \emph{Dasyatis violacea} ({B}onaparte, 1832)},
 journal = {Marine and Freshwater Research},
 volume = {53},
 pages = {531–541}
} 

@Misc{fishbase,
 howpublished = {\url{http://www.fishbase.org/summary/Pteroplatytrygon-violacea.html}}
}