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@article{MZ_1978__162_172722, author = {Brian Thorpe}, title = {An {Extension} of {Cauchy's} {Criterion} to {N\"orlund} {Summability.}}, journal = {Mathematische Zeitschrift}, pages = {139--144}, publisher = {mathdoc}, volume = {162}, year = {1978}, zbl = {0367.40004}, url = {http://geodesic.mathdoc.fr/item/MZ_1978__162_172722/} }
Brian Thorpe. An Extension of Cauchy's Criterion to Nörlund Summability.. Mathematische Zeitschrift, Tome 162 (1978), pp. 139-144. http://geodesic.mathdoc.fr/item/MZ_1978__162_172722/