1. Linear and nonlinear, second-order problems with Sturm–Liouville-type, multi-point boundary conditions;Nonlinear Analysis: Theory, Methods & Applications;2016-05
2. Spectrum of Differential Operators;Topological and Variational Methods with Applications to Nonlinear Boundary Value Problems;2013-10-17
3. Regularity Theorems and Maximum Principles;Topological and Variational Methods with Applications to Nonlinear Boundary Value Problems;2013-10-17
4. Bifurcation Theory;Topological and Variational Methods with Applications to Nonlinear Boundary Value Problems;2013-10-17
5. Morse Theory;Topological and Variational Methods with Applications to Nonlinear Boundary Value Problems;2013-10-17