@article{oai:soar-ir.repo.nii.ac.jp:00012995, author = {IWAI, Kazuo}, journal = {信州大学工学部紀要}, month = {Dec}, note = {Article, 信州大学工学部紀要 31: 9-22 (1971)}, pages = {9--22}, title = {On the Absolute Summability Factors of Fourier Series}, volume = {31}, year = {1971} }