Unbounded Self-adjoint Operators on Hilbert Space
Spectral Theory of Ordinary Differential Operators (Lecture Notes in Mathematics, 1258)
Spectral Properties of Hamiltonian Operators
Linear Partial Differential Operators
One-parameter Semigroups of Positive Operators (Lecture Notes in Mathematics, 1184)
The Rigged Hilbert Space and Quantum Mechanics: Lectures in Mathematical Physics at the University of Texas (Lecture Notes in Physics)
Regular Boundary Value Problems Associated with Pairs of Ordinary Differential Expressions (Lecture Notes in Mathematics, 858)
Linear Partial Differential Operators (Grundlehren der mathematischen Wissenschaften, 116)
Scattering Theory for Many-Body Quantum Mechanical Systems: Rigorous Results (Lecture Notes in Mathematics, 1011)
Precise Spectral Asymptotics for Elliptic Operators Acting in Fiberings over Manifolds with Boundary (Lecture Notes in Mathematics, 1100)
