1.
Bart VA, Khavin VP. Szego-Kolmogorov-Krein theorems on weighted trigonometrical approximation and Carleman-type relations. Ukr. Mat. Zhurn. [Internet]. 1994Feb.25 [cited 2024Jul.27];46(1-2):100–127. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5773