Garden tools – Non-motorized hand-held tools for using in soil – Performance characteristics – Requirements and testing
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 01/01/2018

Garden tools – Non motorized hand-held tools for using in soil – Performance characteristics, requirements and testing
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/2005