1. Rickart C.E., “Banach algebras with an adjoint operation,” Ann. of Math., vol. 47, 528–550 (1946).
2. Berberian S.K., Baer $ \ast $-Rings, Springer, Berlin (1972).
3. Kaplansky I., Rings of Operators, Univ. Chicago, Chicago (1965) (Univ. Chicago Mimeographed Lecture Notes).
4. Sherman S., “The second adjoint of a $ C^{*} $-algebra,” Proc. Internat. Congr. Math. Cambridge, vol. 1, 470 (1950).
5. Takeda Z., “Conjugate spaces of operator algebras,” Proc. Japan Acad., vol. 30, 90–95 (1954).