Regular measures and inner product spaces

Measures on the Splitting Subspaces of an Inner Product Space

Soler's Theorem and Characterization of Inner Product Spaces

Test spaces, dacey spaces, and completeness of inner product spaces

On States on Orthogonally Closed Subspaces of an Inner Product Space

Finitely additive states and completeness of inner product spaces

On the Relation Between Time Representations and Inner Product Spaces