1. Quasiconvexity and relaxation of nonconvex problems in the calculus of variations;Dacorogna, B.;J. Functional Analysis,1982
2. Lecture Notes in Mathematics;Dacorogna, Bernard,1982
3. Collection \'{E}tudes Math\'{e}matiques;Ekeland, Ivar,1974
4. Regularization of optimal design problems for bars and plates. I, II;Lurie, K. A.;J. Optim. Theory Appl.,1982
5. 5. K. A. Lurie and A. V. Cherkaev, Exact estimates of conductivity of composites, Ioffe Physicotechnical Institute Report 783, Leningrad, 1982. See also Dokl. Akad. Nauk SSSR 264 (1982), 1128-1130. (Russian)