1. An abstract approach to model theory;Agler, Jim,1988
2. Subalgebras of 𝐶*-algebras;Arveson, William B.;Acta Math.,1969
3. Subalgebras of 𝐶*-algebras. II;Arveson, William;Acta Math.,1972
4. Graduate Texts in Mathematics, No. 39;Arveson, William,1976
5. [Arv03]arvUnExt W. Arveson. Notes on the unique extension property. Unpublished, 2003. Available from \url{http://math.berkeley.edu/ arveson/Dvi/unExt.pdf}.