1. The effect of malathion, diazinon, and various concentrations of zinc, copper, nickel, lead, iron, and mercury on fish;Alam;Biol. Trace Elem. Res.,1992
2. Effects of nickel on carbohydrate metabolism of Oreochromis niloticus;Alkahem;DIRASAT (Pure and Applied Sciences),1995
3. Nickel – an essential element;Anke;IARC Scientific Publications,1984
4. ANZGFMQ (2000). Aquatic ecosystems. In: Australian and New Zealand Guidelines for Fresh and Marine Water Quality, Vol. 1. The Guidelines. Australian and New Zealand Guidelines for Fresh and Marine Water Quality. http://www.mincos.gov.au/__data/assets/pdf_file/0019/316126/wqg-ch3.pdf
5. The influence of drought-induced acidification on the recovery of plankton in Swan Lake (Canada);Arnott;Ecol. Appl.,2001