1. ASTM D1505. (1985). The Density of Plastics by the Density-Gradient Technique. Annual Book of ASTM Standards. USA.
2. ASTM D1603. (1983). Standard Test Method for Carbon Black Content in Olefin Plastics. Annual Book of ASTM Standards. USA.
3. ASTM D1693. (1980). Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics. Annual Book of ASTM Standards. USA.
4. EN ISO 10319. (2015). Geosynthetics – Wide-width Tensile Test. Europeane Norm-International Organization for Standardization.
5. ENV ISO 13438. (1999). Geotextiles and Geotextile-Related Products-Screening Test Method for Determining the Resistance to Oxidation. Europeane Norm-International Organization for Standardization.