@article{CRMATH_2002__335_10_811_0,
     author = {Darolles, C\'edric},
     title = {Un invariant d'isotopie lisse pour des surfaces dans une vari\'et\'e de dimension 4},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {811--815},
     publisher = {Elsevier},
     volume = {335},
     number = {10},
     year = {2002},
     doi = {10.1016/S1631-073X(02)02566-9},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1016/S1631-073X(02)02566-9/}
}