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

@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{Burk1974,
 author = {Albert J. Burky},
 year = {1974},
 title = {Growth and biomass production of an amphibious snail, \emph{Pomacea urceus} ({M}\"{u}ller), from the {V}enezuelan savannah},
 journal = {Proc. malac. Soc. Lond.},
 volume = {41},
 pages = {127-143}
}