1. The adjoint of a bilinear operation;Arens,1951
2. An Invitation to C∗-Algebras;Arveson,1976
3. On Boolean algebras of projections and algebras of operators;Bade;Trans. Amer. Math. Soc.,1955
4. Sur la bicommutante d'un algèbre d'opérateurs;Dieudonné;Portugal. Math.,1955
5. Linear Operators;Dunford,1971