@article{M2AN_1996__30_6_731_0,
     author = {Braess, Dietrich},
     title = {Stability of saddle point problems with penalty},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {731--742},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {30},
     number = {6},
     year = {1996},
     mrnumber = {1419936},
     zbl = {0860.65054},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1996__30_6_731_0/}
}