1. Difference Equations and Inequalities;Agarwal,1992
2. Discrete Variable Methods in Ordinary Differential Equations;Henrici,1962
3. A method of extrapolation of perturbations;Numerov;Roy. Ast. Soc. Monthly Notices,1924
4. On Numerov's method for solving two point boundary value problems;Agarwal;Utilitas Math.,1985
5. The Numerical Treatment of Differential Equations;Collatz,1960