@article{01686008, title = {Entropy numbers of certain summation operators.}, journal = {Georgian Mathematical Journal}, volume = {8}, year = {2001}, pages = {245-274}, zbl = {1042.47011}, language = {en}, url = {http://dml.mathdoc.fr/item/01686008} }
Creutzig, J.; Linde, W. Entropy numbers of certain summation operators.. Georgian Mathematical Journal, Tome 8 (2001) pp. 245-274. http://gdmltest.u-ga.fr/item/01686008/