1. European group on fracture: Kc and Gc methods for polymers
2. ISO/FDIS 17281: Plastics-Determination of fracture toughness (GIC and KIC) at moderately high loading rates (1 m/s) (2002).
3. ASTM D5045-93: Standard Test Methods for Plane-Strain Fracture Toughness and Strain Energy Release Rate of Plastic Materials (1993).
4. European Structral Integrity Society (ESIS), TC4, Polymers and Composites, A Testing Protocol for Conducting J-Crack Growth Resistance Curve Tests on Plastics (1992).