Food hygiene – Containers for liquid, granulated and powdered foodstuffs – Part 2: Cleaning and disinfection
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2014

Food hygiene – Containers for liquid, granulated and powdered foodstuffs – Part 2: Evaluation of suitability
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/2000