中国科学院数学与系统科学研究院期刊网
AMS
Best m-term One-sided Trigonometric Approximation of Some Function Classes Defined by a Kind of Multipliers
Ren Suo LI, Yong Ping LIU
Acta Mathematica Sinica . 2010, (5): 975 -984 .  DOI: 10.1007/s10114-009-6478-3