@Misc{Wiki,
 howpublished = {\url{https://en.wikipedia.org/wiki/Echinus_(sea_urchin)}}
} 

@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{MiddGurn1998,
 author = {Middleton, D. A. J. and Gurney, W. S. C. and Gage, J. D.},
 year = {1998},
 title = {Growth and energy allocation in the deep-sea urchin \emph{Echinus affinis}},
 journal = {Biological Journal of the Linnean Society},
 volume = {64},
 pages = {315-336}
}