1. Abramowitz, M., Stegun, I. A.: Handbook of mathematical functions. New York: Dover Publications Inc. 1965
2. Bulirsch, R.: Bemerkungen zur Romberg-Integration. Numer. Math.6, 6?16 (1964)
3. Davis, P. J., Rabinowitz, P.: Numerical integration. Blaisdell 1967
4. Fox, L.: Romberg integration for a class of singular integrands. Computer J.10, 87?93 (1967)
5. Gragg, W. B.: On extrapolation algorithms for ordinary initial value problems. J. SIAM (Num. Anal.)2, 384?403 (1965)