Patro, Madhusudan, Susanta Kumar Paikray, and Hemen Dutta. “Statistical Deferred Euler Summability Mean and Associated Korovokin-Type Approximation Theorem”. Science & Technology Asia 25, no. 1 (March 26, 2020): 31–37. Accessed March 28, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/240316.