[Fred2003]
Fredrich, F. (2003).
Long-term investigations of migratory behaviour of asp (Aspius
aspius L.) in the middle part of the Elbe River, Germany.
Journal of Applied Ichthyology, 683:264--342. doi:10.1046/j.1439-0426.2003.00504.xopen_in_newISSN0175-8659.
[Kooy2010]
Kooijman, S. (2010).
Dynamic Energy Budget theory for metabolic organisation.
Cambridge Univ. Press, Cambridge.