Geosynthetic barriers – Test method for the determination of the influence of freezing-thawing cycles on the permeability of clay geosynthetic barriers; German version CEN/TS 14418:2005
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2006

Geosynthetic barriers – Test method for the determination of the influence of freezing-thawing cycles on the permeability of clay geosynthetic barriers; German version CEN/TS 14418:2014
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2014