Teodora Zapryanova and Diko Souroujon. Detailed Study on Characterization of Best Algebraic Approximation by a Generalized Modulus of Smoothness. TPMCS-V7 [Internet]. 2021 Feb. 12 [cited 2026 Jul. 28];:159-6. Available from: https://stm.bookpi.org/TPMCS-V7/article/view/164