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

@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{BertPizz2019,
 doi = {10.1080/24750263.2019.1647298},
 author = {M. Bertoli and E. Pizzul and V. Devescovi and F. Franz and P. Pastorino and P. G. Giulianina and C. Ferrari and F. Nonnis Marzano},
 year = {2019},
 title = {Biology and distribution of {D}anube barbel (\emph{Barbus balcanicus}) ({O}steichthyes: {C}yprinidae) at the {N}orthwestern limit of its range},
 journal = {The European Zoological Journal},
 volume = {86(1)},
 pages = {280–293}
} 

@Misc{fishbase,
 howpublished = {\url{http://www.fishbase.org/summary/Barbus-balcanicus}}
}