1. Ascher, U. and Weiss, R. Collocation for singular perturbation problems II: Linear first order systems without turning points. Math. Comp 43 (1984), 157–187.
2. de Boor, C., de Hoog, F. and de Keller, H. The stability of one step schemes for first-order two-point boundary value problems, SIAM J. Numer. Anal., 20 (1983), 1139–1146.
3. de Hoog, F. and Mattheij, R., On dichotomy and well conditioning in boundary value problems, submitted for publication.
4. Keller, H.B., Numerical solution of two-point boundary value problems, SIAM regional conference series, 24, Philadelphia, 1976.
5. Lentini, L., Osborne, M.R. and Russell, R.D., The close relationships between methods for solving two-point boundary value problems, to appear in SINUM.