1. American Public Health Association (APHA), 1979. Standard Methods for the Examination of Water and Waste Water, 14th edn. APHA, Washington, DC.
2. AOAC, 1995. Official Methods of Analysis of AOAC International: Vol. I. Agricultural Chemicals; Contaminants, Drugs, 16th edn. AOAC International, Arlington, VA.
3. Dietary phosphorus requirement of juvenile Atlantic salmon Salmo salar L.;Asgard;Aquacult. Nutr.,1997
4. Evaluation of acid-insoluble ash as an indicator of feed digestibility in rainbow trout (Salmo gairdneri);Atkinson;Can. J. Aquat. Sci.,1984
5. Development and detection of phosphorus deficiency in Atlantic salmon, Salmo salar L., parr and post-smolts;Baeverfjord;Aquacult. Nutr.,1998