1. ASTM E561-98. Standard Practice for R-curve Determination
2. ASTM E1820-99. Standard Test Method for Measurement of Fracture Toughness
3. ASTM (1960). Fracture testing of high strength sheet materials ? first report of a special ASTM committee. ASTM Bulletin N243, January 1960, 29?40
4. VI. The phenomena of rupture and flow in solids