@article{M2AN_2009__43_5_853_0,
     author = {Gardini, Francesca},
     title = {Mixed approximation of eigenvalue problems : a superconvergence result},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {853--865},
     year = {2009},
     publisher = {EDP Sciences},
     volume = {43},
     number = {5},
     doi = {10.1051/m2an/2009005},
     mrnumber = {2559736},
     language = {en},
     url = {https://www.numdam.org/articles/10.1051/m2an/2009005/}
}