@article{EJDE_2015__2015__a99,
     author = {Chorfi,  Nejmeddine and Jleli,  Mohamed},
     title = {Approximation of the singularity coefficients of an elliptic equation by mortar spectral element method},
     journal = {Electronic journal of differential equations},
     year = {2015},
     volume = {2015},
     zbl = {1322.35008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a99/}
}