Lal, Shyam, and Abhishek Mishra. 2014. “Approximation of Functions of Class $Lip(\alpha,r), (r\geq1)$ by $(N,p_n)(E,1)$ Summability Means of Fourier Series”. Tamkang Journal of Mathematics 45 (3):243-50. https://doi.org/10.5556/j.tkjm.45.2014.876.