• [Wiki] https://en.wikipedia.org/wiki/Zingel_asper.
• [fishbase] https://en.wikipedia.org/wiki/Zingel_asper.
• [CavaPech2003] Cavalli, L., Pech, N., and Chappaz, R. (2003). Diet and growth of the endangered Zingel asper in the Durance river. Journal of Fish Biology, 63:460--471. doi:10.1046/j.1095-8649.2003.00168.x.
• [DanaLabo2007] Danancher, D., Labonne, J., Gaudin, P., and Joly, P. (2007). Scale measurements as a conservation tool in endangered Zingel asper (Linnaeus, 1758). Aquatic Conserv: Mar. Freshw. Ecosyst., 17:712--723. doi:10.1002/aqc.810.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.