中国科学院数学与系统科学研究院期刊网
The Martingale Hardy Type Inequality for Marcinkiewicz-Fejér Means of Two-dimensional Conjugate Walsh-Fourier Series
Ushangi GOGINAVA
Acta Mathematica Sinica . 2011, (10): 1949 -1958 .  DOI: 10.1007/s10114-011-9551-7