@article{EJDE_2000__2000__a140,
     author = {El Hajji,  Mohamed},
     title = {A diffusion equation for composite materials},
     journal = {Electronic journal of differential equations},
     year = {2000},
     volume = {2000},
     zbl = {0936.35176},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a140/}
}