Yilmaz, Ovgu Gurel, Vijay Gupta, and Ali Aral. “On Baskakov Operators Preserving the Exponential Function”. J. Numer. Anal. Approx. Theory 46, no. 2 (November 8, 2017): 150–161. Accessed May 7, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1110.