1. See, for example, rep. of ASTM Joint Task Group G01/05 in cooperation with the Aluminium Association, U.S.A.
2. ASTM Standard E399-74.
3. Linear elastic fracture mechanics of duralumin;Radon;Can. Met. Quart.,1970
4. Linear elastic fracture mechanics of duralumin;Radon;Can. Met. Quart.,1970