1.
Kalchuk IV. Approximation of ( ψ, β )-differentiable functions defined on the real axis by Weierstrass operators. Ukr. Mat. Zhurn. [Internet]. 2007Sep.25 [cited 2024Feb.29];59(9):1201–1220. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3382