1. Eigenvalue comparisons for differential equations on a measure chain;Chyan;Electron. J. Differential Equations,1998
2. Comparison of eigenvalues for discrete Lidstone boundary value problems;Davis;Dynam. Systems Appl.,1999
3. Comparison theorems for a right disfocal eigenvalue problem;Diaz,1994
4. Comparison of eigenvalues for a class of multipoint boundary value problems;Eloe,1992
5. Comparison of eigenvalues for a system of two-point boundary value problems;Eloe,1994