Abel, Ulrich, and Vijay Gupta. “Rate of Convergence of Stancu Beta Operators for Functions of Bounded Variation”. Rev. Anal. Numér. Théor. Approx. 33, no. 1 (February 1, 2004): 3–9. Accessed May 6, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2004-vol33-no1-art1.