MITTAL, M. L.; PRASAD, G.; KUMAR, R. ON THE $||T||\cdot C_1$ SUMMABILITY OF A SEQUENCE OF FOURIER COEFFICIENTS. Tamkang Journal of Mathematics, [S. l.], v. 22, n. 1, p. 25–29, 1991. DOI: 10.5556/j.tkjm.22.1991.4566. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4566. Acesso em: 3 oct. 2022.