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4. Yu. N. Rabotnov, L. Kh. Papernik, and E. I. Stepanychev, “Application of the Nonlinear Theory of Heredity to the Description of Time Effects in Polymeric Materials,” Mekh. Polim., No. 1, 74–87 (1971) [Polymer Mech. (Engl. Trans.) 7 (1), 63–73 (1971)].
5. N. N. Dergunov, L. Kh. Papernik, and Yu. N. Rabotnov, “Analysis of Behavior of Graphite on the Basis of Nonlinear Hereditary Theory,” Zh. Prikl. Mekh. Tekhn. Fiz., No. 2, 76–82 (1971). [J. of App. Mech. Tech. Phys.(Engl.Transl.) 12, 235–240 (1971)].