no. 1
Sharp maximum norm error estimates for general mixed finite element approximations to second order elliptic equations
ESAIM: Modélisation mathématique et analyse numérique, Tome 23 (1989) no. 1, pp. 103-128. 
@article{M2AN_1989__23_1_103_0,
     author = {Gastaldi, Lucia and Nochetto, Ricardo H.},
     title = {Sharp maximum norm error estimates for general mixed finite element approximations to second order elliptic equations},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {103--128},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {23},
     number = {1},
     year = {1989},
     mrnumber = {1015921},
     zbl = {0673.65060},
     language = {en},
     url = {http://archive.numdam.org/item/M2AN_1989__23_1_103_0/}
}
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Gastaldi, Lucia; Nochetto, Ricardo H. Sharp maximum norm error estimates for general mixed finite element approximations to second order elliptic equations. ESAIM: Modélisation mathématique et analyse numérique, Tome 23 (1989) no. 1, pp. 103-128. http://archive.numdam.org/item/M2AN_1989__23_1_103_0/

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