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

@Misc{fishbase,
 howpublished = {\url{https://www.fishbase.in/summary/Leuciscus-aspius.html}}
} 

@article{Fred2003,
 doi = {10.1046/j.1439-0426.2003.00504.xopen_in_newISSN0175-8659},
 author = {F. Fredrich},
 year = {2003},
 title  = {Long-term investigations of migratory behaviour of asp (\emph{Aspius aspius} {L}.) in the middle part of the {E}lbe {R}iver, {G}ermany},
 journal = {Journal of Applied Ichthyology},
 pages = {264-342},
 volume = {683}
} 

@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}}
}