Bitimkhan, S., and D.T. Alibieva. “Generalization of One Theorem of F. Riesz to Some Other Spaces”. Bulletin of the Karaganda University. Mathematics Series 98, no. 2 (June 30, 2020): 40–45. Accessed September 4, 2025. https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/354.