中国科学院数学与系统科学研究院期刊网
AMS
On the Divergence of Norlund Logarithmic Means of Walsh–Fourier Series
Gyorgy GAT, Ushangi GOGINAVA
Acta Mathematica Sinica . 2009, (6): 903 -916 .  DOI: 10.1007/s10114-009-7013-2