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- [7] BEST APPROACH OF PERIODIC DIFFERENTIABILITY FUNCTIONS TO TRIGONOMETRICAL POLYNOMIALS SCIENTIA SINICA, 1962, 11 (11): : 1455 - &
- [8] DUAL TRIGONOMETRICAL SERIES ASSOCIATED WITH BOUNDARY-CONDITIONS OF FIRST AND THIRD KIND NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1975, 22 (03): : A428 - A429