1. Chebyshev, P.L.: Questions on smallest quantities connected with the approximate representation of functions (1859). In: Collected Works, vol. 2, pp. 151–238. Moscow-Leningrad (1947) (In Russian)
2. Computational Geometry Algorithms Library T (1995) CGAL: http://www.cgal.org/
3. Davydov, O.V., Nürnberger, G., Zeilfelder, F.: Approximation order of bivariate spline interpolation for arbitrary smoothness. J. Comput. Appl. Math. 90, 117–134 (1998)
4. de la Vallée Poussin, C.J.: Sur la méthode de l’approximation minimum. Annales de la Société Scientifique de Bruxelles 35, 1–16 (1911)
5. Ioffe, A.D., Tikhomirov, V.M.: Theory of Extremal Problems. North-Holland Pub. Co., Amsterdam (1979)