1. AHLBERG, J.H., NILSON, E.N., WALSH, J.L.: The theory of splines and their applications. New York, Academic Press 1967
2. CALLENDER, E.D.: Single step methods and low order splines for solutions of ordinary differential equations. SIAM J. Numer. Anal. 8, 61–66 (1971)
3. COLLATZ, L.: The numerical treatment of differential equations, Springer-Verlag, 1960
4. HENRICI, P.: Discrete variable methods in ordinary differential equations. John Wiley, New York 1962
5. HUNG, H.S.: The numerical solution of differential and integral equations by spline functions. M.R.C. Tech. Summary Report, 1053, Madison, 1970