Coman, Gheorghe, and Radu T. Trîmbiţaş. “Univariate Shepard-Birkhoff Interpolation”. Rev. Anal. Numér. Théor. Approx. 30, no. 1 (February 1, 2001): 15–24. Accessed May 3, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2001-vol30-no1-art3.