1. Nonlocal boundary value problem of the second kind for a Sturm–Liouville operator;Il’in;Differen. Equat.,1987
2. Nonlocal boundary value problem of the first kind for a Sturm–Liouville operator in its differential and finite difference aspects;Il’in;Differen. Equat.,1987
3. Positive solutions of nonlinear three-point boundary value problems;Ma;J. Math. Anal. Appl.,2003
4. Positive solutions of a nonlinear three-point boundary value problem;Ma;Electron J. Differen. Equat.,1999
5. A sharper condition for the solvability of a three-point second order boundary value problem;Gupta;J. Math. Anal. Appl.,1997