Geodesic
Simultaneous approximation in negative norms of arbitrary order
ESAIM: Mathematical Modelling and Numerical Analysis , Tome 15 (1981) no. 3, pp. 231-235

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@article{M2AN_1981__15_3_231_0,
     author = {Helfrich, Hans-Peter},
     title = {Simultaneous approximation in negative norms of arbitrary order},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {231--235},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {15},
     number = {3},
     year = {1981},
     mrnumber = {631677},
     zbl = {0495.41010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/M2AN_1981__15_3_231_0/}
}
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PB  - Centrale des revues, Dunod-Gauthier-Villars
PP  - Montreuil
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%0 Journal Article
%A Helfrich, Hans-Peter
%T Simultaneous approximation in negative norms of arbitrary order
%J ESAIM: Mathematical Modelling and Numerical Analysis 
%D 1981
%P 231-235
%V 15
%N 3
%I Centrale des revues, Dunod-Gauthier-Villars
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%U http://geodesic.mathdoc.fr/item/M2AN_1981__15_3_231_0/
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%F M2AN_1981__15_3_231_0
Helfrich, Hans-Peter. Simultaneous approximation in negative norms of arbitrary order. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 15 (1981) no. 3, pp. 231-235. http://geodesic.mathdoc.fr/item/M2AN_1981__15_3_231_0/