Konyushkov AA. Fourier coefficients of functions from the classes $B$ and $C$. Parseval equality for the class $C$ or for the Fourier-Stieltjes series. Ukr. Mat. Zhurn. [Internet]. 1993Oct.25 [cited 2024Oct.6];45(10):1455–1460. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5951