@article{CRMATH_2002__335_7_661_0,
     author = {Bernardi, Christine and Pironneau, Olivier},
     title = {Derivative with respect to discontinuities in the porosity},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {661--666},
     publisher = {Elsevier},
     volume = {335},
     number = {7},
     year = {2002},
     doi = {10.1016/S1631-073X(02)02534-7},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/S1631-073X(02)02534-7/}
}