1. Aarnes, J.F., 1970, “Quasi-states on C*-algebras”. Trans.Amer, Math.Soc, 149, 601–625.
2. Abraham, R, 1967. “Foundations of mechanics”. Benjamin, New York; second edition (with J.E. Marsden), 1978.
3. Akcoglu, M.A., 1975. “Positive contractions of L
1-spaces”. Math.Z. 143, 5–13.
4. Alfsen, E.M. and Shultz, F.W., 1976. “Non-commutative spectral theory for affine function spaces on convex sets”. Memoirs of the Amer. Math. Soc., number 172.
5. Amann, A., 1978. “Eine Verallgemeinerung des quantenmechanischen Elementaritätsbegriffs”. Diplomarbeit an der Abteilung für Chemie der ETH Zürich. Unpublished.