1. Subfunctions for ordinary differential equations II;Ako;Funckial. Ekvac.,1967
2. Subfunctions for ordinary differential equations III;Ako;Funckial. Ekvac.,1968
3. Multiple positive solutions of a discrete second order conjugate problem;Avery;PanAmer. Math. J.,1998
4. Multiple positive solutions for a three-point boundary value problem;Anderson;Math. Comput. Modelling,1998
5. Existence of multiple positive solutions to a conjugate boundary value problem;Avery;MSR Hot-Line,1998