@article{CRMATH_2006__343_2_75_0,
     author = {Bourgain, Jean and Nguyen, Hoai-Minh},
     title = {A new characterization of {Sobolev} spaces},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {75--80},
     publisher = {Elsevier},
     volume = {343},
     number = {2},
     year = {2006},
     doi = {10.1016/j.crma.2006.05.021},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2006.05.021/}
}