Variational Methods in Nonlinear Analysis : Optimization and Partial Differen...

Variational Methods in Nonlinear Analysis, Dimitri

Variational Methods in Nonlinear Analysis : Optimization and Partial Differen...

Variational Methods in Nonlinear Analysis : With Applications in Optimization...

Applied Functional Analysis and Variational Methods in Engineering

Motreanu - Variational and Non-variational Methods in Nonlinear Analys - X555z

Morse Theoretic Methods in Nonlinear Analysis and in Symplectic Topology. (=NATO