1. Monotone difference schemes for singular perturbation problems;Abrahamson;SIAM. J. Numer. Anal.,1982
2. The Theory of Splines and Their Applications;Ahlberg,1967
3. Theory and Application of Spline Functions;Greville,1969
4. Applied Iterative Methods;Hageman,1981
5. Numerical Analysis of Singular Perturbation Problems;Hemker,1979