Quasi-free states and automorphisms of the CCR-algebra

Quasi-free states on the C* algebra of CCR

Completely positive quasi-free maps of the CCR-algebra

Non-quasi-free dynamical semi-group on CCR algebras

Quasi-free states of the C.C.R.—Algebra and Bogoliubov transformations

Quasifree states of the C* algebra of CCR. II

On the Continuous Extension of States on the Ccr Algebra