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

@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}}
} 

@Misc{fishbase,
 howpublished = {\url{https://www.fishbase.se/summary/Percina-sciera.html}}
} 

@Misc{fishesoftexas,
 howpublished = {\url{http://txstate.fishesoftexas.org/percina sciera.htm}}
} 

@techreport{PageSmit1970,
 author = {Lawrence M. Page and Philip W. Smith},
 year = {1970},
 title  = {The life history of the dusky darter, \emph{Percina sciera},
 in the {E}mbarras {R}iver, {I}llinois},
 institution = {ILLINOIS NATURAL HISTORY SURVEY, Urbana, Illinois},
 sereis = {Biological Notes},
 volume = {69}
}