引用本文:

杨文善. 可微函数Vallee-Poussin和在L1中的逼近[J]. 浙江大学学报（理学版）, .

Yang Wen-shan. The Approximation of the Function with Fractional Derivative in L1 by de la Vallee-Poussin Sums. . Journal of Zhejiang University (Science Edition), .

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https://www.zjujournals.com/sci/CN/    或    https://www.zjujournals.com/sci/CN/Y1981/V8/I3/270