1. Bauer, H. J.: Entwicklung leistungsfähiger Extrapolationscodes. Diplomarbeit, Universität Heidelberg, Inst. f. Angew. Math., 1983.
2. Bettis, D. G.: A Runge-Kutta-Nyström algorithm. Celestial Mechanics8, 229–233 (1973).
3. Bettis, D. G.: Equations of condition for Runge-Kutta-Nyström algorithms. Dept. of Aerospace Eng. and Eng. Mechanics, University of Texas at Austin, Austin, Texas, 1974.
4. Dormand, J. R., Prince, P. J.: New Runge-Kutta algorithms for numerical simulation in dynamic astronomy. Celestial Mechanics18, 223–232 (1978).
5. Fehlberg, E.: Classical eight- and lower-order Runge-Kutta-Nyström formulas with stepsize control for special second-order differential equations. NASA TR R-381, Washington, D. C., 1972.