Mitchell, S. F.
, Jeppesen, E., Lauridsen, T. L., Christoffersen, K. & Grainger, N. P. J. (1996).
Fish Population Studies in South Island Lakes, 1996: A Report to Fish and Game Councils. Dunedin, New Zealand: University of Otago, Department of Zoology.
Grant, R., Jensen, P. G., Andersen, H. E., Laubel, A. R., Deibjerg, C., Rasmussen, H. & Rasmussen, P. (1996).
Landovervågningsoplande: Vandmiljøplanens Overvågningsprogram 1995. Danmarks Miljøundersøgelser, Aarhus Universitet. Faglig rapport fra DMU Bind 175
http://www.dmu.dk/1_viden/2_Publikationer/3_fagrapporter/rapporter/FR175.pdf