1. Potapow, W. D.: Stability of viscoelastic construction elements, Moscow: Stroizdat 1985 (in Russian).
2. Bolotin, V. V.; Zhinger, N. I.: Int. J. Solids Structures 5 (1969) 965–985.
3. Zyczkowski, M.; Kowalski, A.: Nonconservative stability problems for columns subject to nonlinear creep, Euromech Coll. 190, Dynamical Stability of Inelastic Structures, Technische Universität Hamburg-Harbourg 1984 109–111.
4. Plaut, P. H.; Infante, E. F.: Bounds of motion of some lumped and continuous system, J. Appl. Mech. 39 (1972), 251–256.
5. De Leeuw: Buckling criterion for linear viscoelastic column, AIAA Journal 1 (1963) 2665–2666.