1. Braß, H. (1977) Quadraturverfahren (Vandenhoeck & Ruprecht, Göttingen).
2. Engels, H. (1980) Numerical quadrature and cubature (Academic Press, London).
3. Fox, L., Parker, I. B. (1968) Chebyshev polynomials in numerical analysis (Oxford University Press, London).
4. Haußmann, W., Luik, E., Zeller, K. (1982) Biorthogonality in approximation. This volume.
5. Haußmann, W., Pottinger, P. (1977) On the construction and convergence of multivariate interpolation operators. J. Approx. Theory 19, 205–221.