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Egan, B.J., Delatycki, O. Evaluation of the crack shape and activation energy for fracture in double torsion fracture tests of high density polyethylene. J Mater Sci Lett 14, 340–343 (1995). https://doi.org/10.1007/BF00592144
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DOI: https://doi.org/10.1007/BF00592144