Miheşan, Vasile. “On the Modified Beta Approximating Operators of Second Kind”. Rev. Anal. Numér. Théor. Approx. 34, no. 2 (August 1, 2005): 135–138. Accessed May 5, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2005-vol34-no2-art2.