Schechter Martin

Critical Point Theory : Sandwich And Linking Systems

Fredholm Operators And The Essential Spectrum

Solving Linear Partial Differential Equations

An Introduction To Nonlinear Analysis

Critical Point Theory

Spectra Of Partial Differential Operators (North-Holland Series In Applied Mathematics And Mechanics, V. 14)

Linking Methods In Critical Point Theory

Linking Methods In Critical Point Theory

Minimax Systems And Critical Point Theory

Operator Methods In Quantum Mechanics