1. K. Turner, ?Measurement of toughness in impact testing with recording of oscillograms,? in: Impact Tests of Metals [Russian translation], B. A. Drozdovskii and E. M. Morozov (eds.), Mir, Moscow (1973), pp. 100?123.
2. F. A. Johnson, A. P. Glover and J. C. Randon, ?Fracture toughness and fracture energy measurement on aluminum alloys,? Eng. Fract. Mech.,8, No. 2, 381?386 (1976).
3. A. V. Prokopenko, O. Ya. Znachkovskii, and M. A. Izarov, ?Determination of the characteristics of fracture toughness in impact bending with recording of the oscillograph,? Probl. Prochn., No. 7, 47?51 (1978).
4. G. I. Pogodin-Alekseev, The Dynamic Strength and Toughness of Metals [in Russian], Mashinostroenie, Moscow (1966).
5. S. P. Timoshenko, Oscillations in Engineering Work [in Russian], Nauka, Moscow (1967).