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

@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{CoelErzi2002,
 doi = {10.1071/MF18010},
 author = {Rui Coelho and Karim Erzini},
 year = {2002},
 title  = {Age and growth of the undulate ray, \emph{Raja undulata},
 in the {A}lgarve (southern {P}ortugal)},
 journal = {J. Mar. Biol. Ass. U.K.},
 volmue = {82},
 pages = {987-990}
} 

@Article{SerrErzi2015,
 doi = {10.1111/jfb.12653},
 author = {Serra-Pereira, B. and  Erzini, K. and  Figueiredo, I.},
 year = {2015},
 title  = {Using biological variables and reproductive strategy of the undulate ray \emph{Raja undulata} to evaluate productivity and susceptibility to exploitation},
 journal = {J Fish Biol.},
 volmue = {86(5)},
 pages = {1471-90}
} 

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