On the rate of convergence of Hermite-Fejér polynomials to functions of bounded variation on the zeros of certain Jacobi polynomials Radwan Al-Jarrah, Abedallah Rababah (1990) Revista colombiana de matematicas
On the Uniform Approximation to Continuous Functions by Linear Aggregates of Translations. Ulrich Abel (1984) Mathematische Annalen
Optimal Cycles in Doubly Weighted Graphs and Approximation of Bivariate Functions by Univariate Ones. M.von Golitschek (1982) Numerische Mathematik