1. Discrete and Continuous Boundary Value Problems;Atkinson,1964
2. Indefinite Sturm-Liouville problems;Atkinson,1984
3. Asymptotics of the number of zeros and of the eigenvalues of general weighted Sturm-Liouville problems;Atkinson;J. Reine Angew. Math.,1987
4. Spectral properties of two parameter eigenvalue problems, II;Binding,1987
5. Eigencurves for two parameter self-adjoint ordinary differential equations of even order;Binding;J. Differential Equations,1989