SAHANI, S. K.; MISHRA, L. N. Degree of Approximation of Signals by Norlund Summability of Derived Fourier series. The Nepali Mathematical Sciences Report, [S. l.], v. 38, n. 2, p. 13–19, 2021. DOI: 10.3126/nmsr.v38i2.42845. Disponível em: https://nepjol.info/index.php/nmsr/article/view/42845. Acesso em: 16 aug. 2024.