@article{M2AN_1988__22_1_29_0,
     author = {Banerjee, Uday},
     title = {Approximation of eigenvalues of differential equations with non-smooth coefficients},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {29--51},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {22},
     number = {1},
     year = {1988},
     mrnumber = {934700},
     zbl = {0639.65051},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1988__22_1_29_0/}
}