谢敦礼. 连续正算子序列逼近的阶[J]. 浙江大学学报(理学版), .
Xie Dun-li. Degree of Approximation by Positive Convolution Operators.. Journal of Zhejiang University (Science Edition), .
https://www.zjujournals.com/sci/CN/ 或 https://www.zjujournals.com/sci/CN/Y1981/V8/I4/363
Cited