Lal, Shyam, and Gopal Krishna Singh. “Degree of Approximation of Conjugate of Lip $ \alpha$ Class Function by $ {K^\lambda}$-Summability Means of Conjugate Series of a Fourier Series”. Tamkang Journal of Mathematics 34, no. 4 (December 31, 2003): 387–394. Accessed April 19, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/241.