1.
Serdyuk AS. Approximation of Poisson Integrals by de la Vallée Poussin Sums. Ukr. Mat. Zhurn. [Internet]. 2004Jan.25 [cited 2024May19];56(1):97-107. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3731