1. Acerbi E., Dal Maso G. New lower semicontinuity results for polyconvex integrals, preprint S.I.S.S.A. 52/M, 1993
2. Ball J.M. Convexity conditions and existence theorems in nonlinear elasticity. Arch. Rational Mech. Anal. 63 (1977), 337–403
3. Buttazzo, G. Semicontinuity, relaxation and integral representation in the calculus of variations, Pitman Research Notes in Maths. 207 (1989)
4. Dacorogna B., Marcellini P. Semicontinuité pour des intégrandes polyconvexes sans continuité des déterminants, C.R. Acad. Sci. Paris, 311 (1990), 393–39
5. Dal Maso G., Sbordone C. Weak lower semicontinuity of polyconvex integrals: a borderline case, preprint S.I.S.S.A. 45/M, 1993