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

@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{ComeAnse1988,
 author = {Comely, C. A. and Ansell, A. D.},
 year = {1988},
 title = {Population Density and Growth of \emph{Echinus esculentus} {L}. on the {S}cottish {W}est {C}oast},
 journal = {Estuarine, Coastel and Shelf Science},
 volume = {27},
 pages = {311-334}
} 

@Misc{BIOTIC,
 howpublished = {\url{http://www.marlin.ac.uk/biotic/browse.php?sp=4193}}
} 

@Misc{EoL,
 howpublished = {\url{http://eol.org/pages/599659/overview}}
}