1. Official Methods of Analysis of the Association of Official Analytical Chemists;AOAC,1980
2. Weight reduction on lactovegetarian and mixed diets. Changes in weight, nutrient intake, skinfold thicknesses and blood pressure;Hakala;Eur. J. Clin. Nutr.,1989
3. Food analysis for lead using furnace atomic absorption and a L'vov platform;Koirtyohann;J. Ass. Off. Analyt. Chem.,1982
4. Intake of heavy metals: comparison of methods;Kumpulainen,1991
5. Analytical quality control program used by the trace elements in foods and diets sub-network of the FAO European Cooperative Method on Trace Elements;Kumpulainen;Fresenius Z. Anal. Chem.,1987