Geller, Daryl, and Isaac Z. Pesenson. “Kolmogorov and Linear Widths of Balls in Sobolev Spaces on Compact Manifolds”. MATHEMATICA SCANDINAVICA 115, no. 1 (August 12, 2014): 96–122. Accessed November 21, 2024. https://www.mscand.dk/article/view/18005.