@article{AIHPC_2003__20_3_359_0,
     author = {Acerbi, E. and Bouchitt\'e, G. and Fonseca, I.},
     title = {Relaxation of convex functionals : the gap problem},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {359--390},
     publisher = {Elsevier},
     volume = {20},
     number = {3},
     year = {2003},
     doi = {10.1016/S0294-1449(02)00017-3},
     mrnumber = {1972867},
     zbl = {1025.49012},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/S0294-1449(02)00017-3/}
}