Šeletski, Anna, and Anne Tali. “Comparison of Speeds of Convergence in Riesz‐type Families of Summability Methods. II”. Mathematical Modelling and Analysis 15, no. 1 (February 15, 2010): 103-112. Accessed April 26, 2024. https://journals.vilniustech.lt/index.php/MMA/article/view/5976.