- Ambrosetti & Malchiodi: Nonlinear Analysis and Semilinear Elliptic Problems, Cambridge studies in advanced mathematics vol. 104, Cambridge University Press, Cambridge, 2007;
- Ciarlet: Linear and Nonlinear Functional Analysis with Applications, Society for Industrial and Applied Mathematics, Philadelphia, 2013;
- Schechter: An Introduction to Nonlinear Analysis, Cambridge studies in advanced mathematics vol. 95, Cambridge University Press, Cambridge, 2012.