1. Some new finite difference methods for computing eigenvalues of two-point boundary-value problems;Usmani;Comp. & Maths. with Appls.,1985
2. The Numerical Solution of Two-Point Boundary Value Problems in Ordinary Differential Equations;Fox,1957
3. Numerical Solution of Differential Equations;Fried,1979
4. A First Course in Partial Differential Equations;Weinberger,1965
5. Numerical Methods for Two-Point Boundary-Value Problems;Keller,1968