Raşa, Ioan. “On Soardi’s Bernstein Operators of Second Kind”. Rev. Anal. Numér. Théor. Approx. 29, no. 2 (August 1, 2000): 191–199. Accessed April 26, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2000-vol29-no2-art9.