1. I.I. Goldenblatt: Some questions of mechanics of deformable media (in Russian), 1955.
2. A.M. Freudenthal and H. Geiringer: The Mathematical Theories of the Thelasic Continuum, Handbuch der Physik 6, 229–433, Berlin 1958.
3. R. Bland: The Theory of Linear Viscoelasticity, Oxford 1960.
4. N.Kh. Arutyunyan: Some Questions of the Creep Theory, (in Russian), Moscow 1952.
5. Yu.N. Rabotnov: The equilibrium of elastic media with a heredity, (in Russian), Prikl. Mat. Mech. 12 (1948), 53–62.