(EFSA), E. F. S. A. (2008). Opinion on certain bisglycinates as sources of copper, zinc, calcium, magnesium and glycinate nicotinate as source of chromium in foods intended for the general population (including food supplements) and foods for particular nutritional uses ‐ Scientific Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food. Wiley.

(EFSA), European Food Safety Authority. Opinion on Certain Bisglycinates as Sources of Copper, Zinc, Calcium, Magnesium and Glycinate Nicotinate as Source of Chromium in Foods Intended for the General Population (including Food Supplements) and Foods for Particular Nutritional Uses ‐ Scientific Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food. Wiley, 2008.

(EFSA), European Food Safety Authority. Opinion on Certain Bisglycinates as Sources of Copper, Zinc, Calcium, Magnesium and Glycinate Nicotinate as Source of Chromium in Foods Intended for the General Population (including Food Supplements) and Foods for Particular Nutritional Uses ‐ Scientific Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food. Wiley, 2008.