1. E. Kirchberg and N. C. Phillips, Embedding of exact $C^*$-algebras in the Cuntz algebra $\mathcalO_2$, J. Reine Angew. Math. 525 (2000), 17–53.
2. G. K. Pedersen, $C^*$-Algebras and Their Automorphism Groups, London Math. Soc. Monogr. 14, Academic Press, London, 1979.
3. D. H. Bisch, On the existence of central sequences in subfactors, Trans. Amer. Math. Soc. 321 (1990), 117–128.
4. B. Blackadar, Symmetries of the CAR algebra, Ann. of Math. (2) 131 (1990), 589–623.
5. ––––, $K$-Theory for Operator Algebras, 2nd ed., Math. Sci. Res. Inst. Publ. 5, Cambridge Univ. Press, Cambridge, 1998.