1. Effect of microbial phytase and 1,25-dihydroxy-cholecalciferol on dietary copper utilization in chicks;Aoyagi;Poult. Sci.,1995
2. Comparative intestinal absorbtion and subsequent metabolism of metal amino acid chelates and inorganic metal salts;Ashmead,1993
3. Association of Official Analytical Chemists International (AOAC), 17th ed. AOAC Int’l., Gathersburg, MA, USA, 2000, p. 32 (Chapter 2).
4. Manganese utilization in the chick: Effects of excess phosphorus on chicks fed manganese-deficient diets;Baker;Poult. Sci.,1994
5. Manganese and iron interrelationship in the chick;Baker;Poult. Sci.,1991