1. Ben Yaacov, I., Berenstein, A., Henson, C.W., Usvyatsov, A.: Model theory for metric structures. In: Chatzidakis, Z., et al. (eds.) Model Theory with Applications to Algebra and Analysis, Vol. II, number 350 in London Math. Soc. Lecture Notes Series, pp. 315–427. Cambridge University Press, (2008)
2. Blackadar, B.: Shape theory for $${\rm {C}} ^*$$ C ∗ -algebras. Math. Scand. 56(2), 249–275 (1985)
3. Blackadar, B.: K-theory for Operator Algebras, vol. 5. Cambridge University Press, Cambridge (1998)
4. Brown, N.P.: Topological dynamical systems associated to II $$_1$$ 1 factors. Adv. Math. 227(4), 1665–1699 (2011). (With an appendix by Narutaka Ozawa)
5. Carlson, K., Cheung, E., Farah, I., Gerhardt-Bourke, A., Hart, B., Mezuman, L., Sequeira, N., Sherman, A.: Omitting types and AF algebras. Arch. Math. Log. 53, 157–169 (2014)