@article{GMJ_2001__8_2_50859,
     author = {Creutzig, J. and Linde, W.},
     title = {Entropy numbers of certain summation operators.},
     journal = {Georgian mathematical journal},
     pages = {245--274},
     year = {2001},
     volume = {8},
     number = {2},
     zbl = {1042.47011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_2001__8_2_50859/}
}