Stancu, D. D. “ On the Beta Approximating Operators of Second Type Kind”. Rev. Anal. Numér. Théor. Approx. 24, no. 1 (August 1, 1995): 231–239. Accessed September 3, 2025. https://www.ictp.acad.ro/jnaat/journal/article/view/1995-vol24-nos1-2-art26.