Approximation of Piecewise Continuous Functions by a Modification of Piecewise Hermite Interpolation. J. HERTLING — 1970 Numerische Mathematik
Numerical Treatment of Singular Integral Equations by Interpolation Methods. J. Hertling Numerische Mathematik
Multivariate approximation theory with Δ -splines J. Hertling — 1974 Acta Universitatis Carolinae. Mathematica et Physica
B-Convergence Properties of Defect Correction Methods. I. J. Hertling; R. Frank; H. Lehner — 1986 Numerische Mathematik
B-Convergence Properties of Defect Correction Methods. II. J. Hertling; R. Frank; H. Lehner — 1986 Numerische Mathematik