1. Nutrient requirements of laboratory animals;NRC (National Research Council),1995
2. Nutrient requirements of poultry;NRC (National Research Council),1994
3. Nutrient requirements of sheep;NRC (National Research Council),1995
4. Nutrient requirements of swine;NRC (National Research Council),1998
5. NIH (National Institute of Health) (Updated: 08/01/2004): http://ods.od.nih.gov/factsheets/selenium.asp.