1. AAFCO (Association of American Feed Control Officials), 2014. Metal Amino Acid Complex. Pagzres 401–402 in Feed Terms and Ingredient Definitions. Chapter 6. Mineral Products. 57.151 (IFN 6‐16‐293). Official publication. Association of American Feed Control Officials Inc., Olympia, WA.
2. ATSDR (Agency for Toxic Substances and Disease Registry), 2005. Toxicological profile for zinc. Available online: http://www.atsdr.cdc.gov/toxprofiles/tp60.pdf
3. De Groote G, Lippens M, Jongbloed AW and Meschy F, 2002. Study on the bioavailability of major and trace minerals. Emfema (Int. Ass. of the EU; Manufacturers of Major, Trace and Specific Feed Mineral Materials. 100–109.
4. EC (European Commission) , 2003a. Opinion of the Scientific Committee for Animal Nutrition on the use of zinc in feedingstuffs. Available online: https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_rules_scan-old_report_out120.pdf
5. EC (European Commission) , 2003b. Opinion of the Scientific Committee on Food on the tolerable upper intake level of zinc. Available online: https://ec.europa.eu/food/sites/food/files/safety/docs/sci-com_scf_out177_en.pdf