@article{CRMATH_2004__339_11_757_0,
     author = {Jaffard, St\'ephane},
     title = {Pointwise regularity criteria},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {757--762},
     publisher = {Elsevier},
     volume = {339},
     number = {11},
     year = {2004},
     doi = {10.1016/j.crma.2004.10.011},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.crma.2004.10.011/}
}