1. Approximate solutions of differential equations with deviating arguments;Allinger;SIAM J. Numer. Anal.,1976
2. The Numerical Treatment of Differential Equations;Collatz,1966
3. Approximation in partial differential equation;Collatz,1959
4. Numerical methods for functional differential equations;Cryer,1972
5. Functional Differential Equations;Hale,1971