Determination of whey protein content and casein content in total protein of milk and milk products – Derivative spectroscopic method
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/1999

Milk and milk products – Determination of whey protein content and casein content in total protein – Derivative spectroscopic method
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2011