JUMABAYEVA, A.; Zhetpisbayeva А. INEQUALITY OF THE BEST ANGULAR APPROXIMATION. Bulletin of Abai KazNPU. Series of Physical and Mathematical sciences, Almaty, Kazakhstan, v. 89, n. 1, p. 50–66, 2025. DOI: 10.51889/2959-5894.2025.89.1.005. Disponível em: https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/2180. Acesso em: 15 dec. 2025.