2013LST EN 13956-2013 Flexible sheets for waterproofing - Plastic and rubber sheets for roof waterproofing - Definitions and characteristics
2002LST EN 12893-2002 Copper and copper alloys - Determination of spiral elongation number
LST EN 12893-2002 Copper and copper alloys - Determination of spiral elongation number was changed to LST EN 13956-2013 Flexible sheets for waterproofing - Plastic and rubber sheets for roof waterproofing - Definitions and characteristics.