1. “Vereinfachte numerische Integration”;Romberg;Det K. Norske Vidensk. Selsk. Forhandlinger.,1955
2. An investigation of Romberg quadrature;Fairweather;TOMS,1978
3. On the practical application of the modified Romberg algorithm;Håvie;BIT,1967
4. Handheld calculator evaluates integrals;Kahan;Hewlett-Packard Journal,1980
5. Generalized Neville type extrapolation schemes;Håvie;BIT,1979