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2. J. Hopkinson, in: B. Hopkinson (Ed.), Further Experiments on the Rupture of Iron Wire by a Blow (1872), Article 39, Original Papers by the Late John Hopkinson, Vol. II, Scientific Papers, Cambridge University Press, 1901, pp. 316–320.
3. The effects of momentary stress in metals;Hopkinson;Proc. Phys. Soc. London,1904
4. A method of measuring the pressure produced in the detonation of high explosives by the impact of bullets;Hopkinson;Philos. Trans. R. Soc. London,1914
5. An investigation of the mechanical properties of materials at very high rates of loading;Kolsky;Proc. Phys. Soc. London,1949