1. Plane-strain crack toughness testing of high-strength metallic materials;Brown;ASTM Spec. Tech. Publ STP-410,1966
2. Design and use of displacement gage for crack extension measurements;Fisher;NASA Tech. Note No. D-3724,1966
3. Mechanisms of slow crack growth in high-strength steels and titanium;Hartbower;Tech. Rep. No. AFML-TR-67-26,1969