Voir la notice de l'article provenant de la source Heldermann Verlag
@article{JCA_1998_5_1_a7, author = {P. Pedregal and V. Sverak}, title = {A {Note} on {Quasiconvexity} and {Rank-One} {Convexity} for 2x2 {Matrices}}, journal = {Journal of convex analysis}, pages = {107--118}, publisher = {mathdoc}, volume = {5}, number = {1}, year = {1998}, url = {http://geodesic.mathdoc.fr/item/JCA_1998_5_1_a7/} }
P. Pedregal; V. Sverak. A Note on Quasiconvexity and Rank-One Convexity for 2x2 Matrices. Journal of convex analysis, Tome 5 (1998) no. 1, pp. 107-118. http://geodesic.mathdoc.fr/item/JCA_1998_5_1_a7/