@article{CRMATH_2006__343_5_367_0,
     author = {De Lellis, Camillo and Sz\'ekelyhidi, L\'aszl\'o Jr.},
     title = {Simple proof of two-well rigidity},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {367--370},
     publisher = {Elsevier},
     volume = {343},
     number = {5},
     year = {2006},
     doi = {10.1016/j.crma.2006.07.008},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2006.07.008/}
}