no. 2
L ∞ -convergence of saddle-point approximations for second order problems
RAIRO. Analyse numérique, Tome 11 (1977) no. 2, pp. 209-216 
@article{M2AN_1977__11_2_209_0,
     author = {Scholz, Reinhard},
     title = {$L_\infty $-convergence of saddle-point approximations for second order problems},
     journal = {RAIRO. Analyse num\'erique},
     pages = {209--216},
     year = {1977},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {11},
     number = {2},
     mrnumber = {448942},
     zbl = {0356.35026},
     language = {en},
     url = {https://www.numdam.org/item/M2AN_1977__11_2_209_0/}
}
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Scholz, Reinhard. $L_\infty $-convergence of saddle-point approximations for second order problems. RAIRO. Analyse numérique, Tome 11 (1977) no. 2, pp. 209-216. https://www.numdam.org/item/M2AN_1977__11_2_209_0/

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