1. Unitary operators in 𝐶*-algebras;Glimm, James G.;Pacific J. Math.,1960
2. Irreducible operator algebras;Kadison, Richard V.;Proc. Nat. Acad. Sci. U.S.A.,1957
3. A theorem on rings of operators;Kaplansky, Irving;Pacific J. Math.,1951
4. On rings of operators. IV;Murray, F. J.;Ann. of Math. (2),1943
5. Approximative properties of matrices of high finite order;von Neumann, John;Portugal. Math.,1942