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2. G. Temple andW. G. Bickley,Rayleigh's Principle, pp. 1–33 (Dover Publ., Inc., New York, 1956).
3. A. A. Movchan,The Direct Method of Liapunov in Stability Problems of Elastic Systems, PMM,23, 483–93 (1959).
4. M. Hetenyi,Beams on Elastic Foundation, pp. 141–150 (The University of Michigan Press, Ann Arbor, USA, 1971).
5. C. Sundararajan,Influence of End Supports on the Stability of Nonconservative Elastic Systems (to be published).