Igenberlina, A., and Zh. Keulimzhayeva. “On the Strong Summability of the Fourier–Walsh Series in the Besov Space”. Ukrains’kyi Matematychnyi Zhurnal 76, no. 9 (April 16, 2025): 1304–1315. Accessed December 15, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/7577.