1. Nonlocal boundary value problem of the second kind for a Sturm-Liouville operator;Ll'in;Diff. Eqns,1988
2. On an m-point boundary value problem for second order ordinary differential equations;Gupta;Nonlinear Analysis,1994
3. GUPTA C. P., NTOUYAS S. K. & TSAMATOS P. Ch., Existence results for m-point boundary value problems, J. Diff. Eqns Dyn. Syst. (to appear).
4. Landesman-Lazer Type Problems for Nonlinear Equations;Mawhin,1977
5. Topological Degree Methods in Nonlinear Boundary Value Problems;Mawhin,1979