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@article{MM2_1980__31_154711, author = {W. Beekmann and Shao-Chien Chang}, title = {Some {Summability} {Invariants.}}, journal = {Manuscripta mathematica}, pages = {363--378}, publisher = {mathdoc}, volume = {31}, year = {1980}, zbl = {0435.40008}, url = {http://geodesic.mathdoc.fr/item/MM2_1980__31_154711/} }
W. Beekmann; Shao-Chien Chang. Some Summability Invariants.. Manuscripta mathematica, Tome 31 (1980), pp. 363-378. http://geodesic.mathdoc.fr/item/MM2_1980__31_154711/