Sahani, S. K., V. N. Mishra, and N. P. Pahari. “On the Degree of Approximation of a Function by Nörlund Means of Its Fourier Laguerre Series”. Nepal Journal of Mathematical Sciences, vol. 1, Oct. 2020, pp. 65-70, doi:10.3126/njmathsci.v1i0.34164.