中国科学院数学与系统科学研究院期刊网
AMS
Almost Everywhere Convergence of Fejér Means of L1 Functions on Rarely Unbounded Vilenkin Groups
György GÁT
Acta Mathematica Sinica . 2007, (12): 2269 -2294 .  DOI: 10.1007/s10114-007-0961-5