Spectral theory of linear operators

Spectral Theory of Linear Differential Operators and Comparison Algebras by Hein

Spectral Theory for Linear Operators : Demicompactness and Perturbation Theory

Spectral Theory of Linear Differential Operators and Comparison Algebras by Hein

Linear Operators, Spectral Theory by Dunford

Spectral Theory of Linear Differential Operators and Comparison Algebras by Hein

Spectral Theory of Linear Differential Operators and Comparison Algebras, Pap...

Spectral Theory of Linear Differential Operators and Comparison Algebras: New