@article{MZ_1976__148_172345,
     author = {Wolfgang Dahmen and Ernst G\"orlich},
     title = {Best {Approximation} with {Exponential} {Orders} and {Intermediate} {Spaces.}},
     journal = {Mathematische Zeitschrift},
     pages = {7--22},
     publisher = {mathdoc},
     volume = {148},
     year = {1976},
     zbl = {0318.41022},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__148_172345/}
}