%0 Journal Article
%A Sergio Conti
%A Camillo De Lellis
%A Stefan Müller
%A Mario Romeo
%T Polyconvexity equals rank-one convexity for connected isotropic sets in $ \mathbb{M}^{\mathrm{2\times 2}}$
%J Comptes Rendus. Mathématique
%D 2003
%P 233-238
%V 337
%N 4
%I Elsevier
%R 10.1016/S1631-073X(03)00333-9
%G en
%F CRMATH_2003__337_4_233_0