@article{oai:u-ryukyu.repo.nii.ac.jp:02005352,
 author = {Nishishiraho, Toshihiko and 西白保, 敏彦},
 journal = {Ryukyu mathematical journal},
 month = {Feb},
 note = {Quantitative estimates for approximation processes of convolution operators in Banach spaces are obtained by using moduli of continuity and by taking higher order absolute moments., 紀要論文},
 pages = {47--70},
 title = {Approximation by convolution operators in Banach spaces},
 volume = {4},
 year = {1992}
}