Birou, Marius. “Biermann Interpolation of Birkhoff Type”. Rev. Anal. Numér. Théor. Approx. 34, no. 1 (February 1, 2005): 37–45. Accessed April 29, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2005-vol34-no1-art4.