Von Neumann J. Collected works. Volume 3. Ring of operators

Pergamon Press, 1961, 584 p. — ASIN: B00843PLXQ.
Volume III : Rings of Operators — contains his work on, and closely related to, the theory of the rings of operators.On A Certain Topology for Rings of Operators.
On RIngs of Operators.
On rings of operators II.
On rings of operators III.
On rings of operators IV.
On infinite direct products.
On rings of operators. Reduction Theory.
On some algebraical properties of operator rings.
On an algebraic generalization of the quantum mechanical formalism (Part I).
Characterization of Factors of Type.