中国科学院数学与系统科学研究院期刊网
AMS
Bernstein n-Widths for Classes of Convolution Functions with Kernels Satisfying Certain Oscillation Properties
Guo FENG, Gen Sun FANG
Acta Mathematica Sinica . 2009, (3): 393 -402 .  DOI: 10.1007/s10114-008-7308-8