@article{M2AN_1978__12_1_27_0, author = {Canuto, C.}, title = {Eigenvalue approximations by mixed methods}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis }, pages = {27--50}, publisher = {Centrale des revues, Dunod-Gauthier-Villars}, address = {Montreuil}, volume = {12}, number = {1}, year = {1978}, mrnumber = {488712}, zbl = {0434.65032}, language = {en}, url = {http://geodesic.mathdoc.fr/item/M2AN_1978__12_1_27_0/} }