1. J. Ferry, Viscoelastic Properties of Polymers [Russian translation], Moscow (1963).
2. S. G. Turlei and Kh. Keskkula, ?Study of multiple transformations in polymers by dynamic mechanical method,? in: Transformations and Relaxation Phenomena in Polymers [in Russian], Moscow (1968), pp. 86?108.
3. I. I. Krush and M. I, Rozovskii, ?Effect of loading history on the free vibrations of a hereditary-elastic oscillator,? Mekh. Polim., No. 2, 222?226 (1968).
4. Yu. N. Rabotnov, Elements of the Hereditary Mechanics of Solids [in Russian], Moscow (1977).
5. I. I. Bugakov, I. I. Demidova, and T. A. Leonova, ?Creep and photoelasticity of an amorphous polymer,? Izv. Akad. Nauk SSSR, Mekh. Tverd. Tela, No. 3, 146?154 (1974).