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- [7] ON STRONG LOGARITHMIC SUMMABILITY OF FOURIER SERIES BULLETIN OF THE CALCUTTA MATHEMATICAL SOCIETY, 1967, 59 (3-4): : 93 - &
- [10] ON A PROBELM OF STRONG SUMMABILITY OF FOURIER SERIES ACTA MATHEMATICA ACADEMIAE SCIENTIARUM HUNGARICAE, 1968, 19 (1-2): : 87 - &