Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1972__7_154102, author = {Rolf Trautner}, title = {Hausdorff-Summability of {Power} {Series} {I.}}, journal = {Manuscripta mathematica}, pages = {1--12}, publisher = {mathdoc}, volume = {7}, year = {1972}, zbl = {0235.40008}, url = {http://geodesic.mathdoc.fr/item/MM2_1972__7_154102/} }
Rolf Trautner. Hausdorff-Summability of Power Series I.. Manuscripta mathematica, Tome 7 (1972), pp. 1-12. http://geodesic.mathdoc.fr/item/MM2_1972__7_154102/