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2. N. A. Makhutov, Resistance of Structural Elements to Brittle Fracture [in Russian], Mashinostroenie, Moscow (1973).
3. S. E. Gurevich and T. S. Mar'yanovskaya, ?Using the crack propagation resistance test to assess the cyclic strength of metals,? Probl. Prochnosti, No. 7 (1970).
4. W. Brown and G. Srawley, Fracture Toughness Testing of High-Strength Materials in Plane Strain [Russian translation], Mir, Moscow (1972).
5. V. S. Ivanova and V. G. Kudryashov, ?A method of finding fracture toughness (KIc) from the results of fatigue tests,? Probl. Prochnosti, No. 3 (1970).