1. Nonlinear Two-point Boundary value Problems;Bailey,1968
2. An Introduction to Nonlinear Boundary Value Problems;Bernfeld,1974
3. Coincidence degree and nonlinear differential equations;Gaines;Springer Lecture Notes in Mathematics,1977
4. Nonlinear boundary value problems for ordinary differential equations;Granas;Dissnes Math.,1985
5. Finiteness of the set of solutions of some boundary value problems for ordinary differential equations;Brüll;Arch. Math. (Brno),1988