[1] BOSANQUET L. S.: Mathematical Reviews. 2, 1950, 654.
[2] ORHAN C.:
On Absolute Summability. Bull. Inst. Math. Academia Sinica, 15, 1987, 433-437.
MR 0942786 |
Zbl 0649.40009
[3] SUNOUCHI G.: Notes on Fourier Analysis: XVIII, absolute summability of a series with constant terms. Tohoku Math. Jour., 2, 1949, 57-65.