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2. N. V. Banichuk, Shape Optimization for Elastic Bodies [in Russian], Moscow (1980).
3. V. A. Troitskii and L. V. Petukhov, Shape Optimization for Elastic Bodies [in Russian], Moscow (1982).
4. K. A. Lur'e, Optimal Control in Problems of Mathematical Physics [in Russian], Moscow (1975).
5. A. A. Chiras, A. È. Baraskauskas, and R. P. Karkauskas, Theory and Methods of the Optimization of Elastoplastic Systems [in Russian], Leningrad (1974).