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

@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{Karr1963,
 author = {James R. Karr},
 year = {1963},
 title = {Age, Growth, and Food Habits of Johnny, Slenderhead and Blacksided Darters of Boone County, {I}owa},
 journal = {Proceedings of the Iowa Academy of Science},
 volume = {70},
 pages = {228-236}
} 

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