Bakhyt, A., and N.T. Tleukhanova. “The Problem of Trigonometric Fourier Series Multipliers of Classes in λp,q Spaces”. Bulletin of the Karaganda University. Mathematics Series 100, no. 4 (December 30, 2020): 17–25. Accessed September 4, 2025. http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/375.