1. C.A. Akemann and F.W. Shultz, Perfect C*-algebras, Memoirs Amer. Math. Soc. 326 (1985).
2. E.M. Alfsen, On the Dirichlet problem of the Choquet boundary., Acta Math. 120 (1968), 149–159.
3. E.M. Alfsen, Compact convex sets and boundary integrals, Springer Verlag, Berlin-Heidelberg-New York, 1971.
4. R. Alicki and K. Lendi, Quantum Dynamical Semigroups and Applications, Lecture Notes in Physics, No. 286, Springer-Verlag, Berlin-Heidelberg, 1987.
5. W.B. Arveson, Subalgebras of C*-algebras, Acta Math. 123 (1969), 141–224.