Y. Khasanov, “On the Absolute Summability of Fourier Series of Almost Periodic Functions”, Ukr. Mat. Zhurn., vol. 65, no. 12, pp. 1716–1722, Dec. 2013, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2549