中国科学院数学与系统科学研究院期刊网
AMS
Trigonometric Series with a Generalized Monotonicity Condition
Lei FENG, Vilmos TOTIK, Song Ping ZHOU
Acta Mathematica Sinica . 2014, (8): 1289 -1296 .  DOI: 10.1007/s10114-014-3496-6