Yessenbayeva, G.A., and D.N. Yesbayeva. “Characterizations for the Family of Functions Classes {B^r_p,q,N} and Their Connection With Besov’s Spaces”. Bulletin of the Karaganda University. Mathematics Series 87, no. 3 (September 29, 2017): 70–75. Accessed July 10, 2025. https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/169.