Jafarov, Sadulla Z. “Approximation of Functions Belonging to the Weighted L(a, M, Omega)-Class by Trigonometric Polynomials”. New Zealand Journal of Mathematics 48 (December 31, 2018): 11–23. Accessed December 5, 2021. https://www.nzjmath.org/index.php/NZJMATH/article/view/24.