1. Leipholz, H. H. E., andK. Huseyin: On the Stability of One-Dimensional Continuous Systems with Polygenic Forces. Meccanica6, 253?257 (1971).
2. Leipholz, H. H. E.: Dynamic Stability, in: Stability, SM Study No. 6, Solid Mechanics Division, University of Waterloo, Waterloo, Ontario, Canada, 1972, pp. 272?274.
3. Leipholz, H. H. E.: Étude de l'écrasement des plaques minces soumises à des forces ?suivantes? non conservatives, Comptes Rendus, Journées AFPC, 22?23, Avril, 1974, pp. 234?242, Association Française des Ponts et Charpentes, 46 av. Aristide-Briand ? 92223 Bagneux.
4. ?See [1b],: Dynamic Stability, in: Stability, SM Study No. 6, Solid Mechanics Division, University of Waterloo, Waterloo, Ontario, Canada, 1972, pp. 267?270.
5. Leipholz, H. H. E.: Stability Theory pp. 192?195, 230?252. New York-London: Academic Press. 1970.