1. Braun, H., Koecher, M.: Jordan-Algebren. Berlin-Heidelberg-New York: Springer 1966
2. Chevalley, C.: The Algebraic Theory of Spinors. Columbia Univ. Press, New York 1954
3. Dorfmeister, J.: Infinitesimal Automorphisms of Homogeneous Siegel Domains, preprint
4. Jacobson, N.: Structure and Representation of Jordan Algebras. AMS Coll. Publ., Rhode Island, Providence 1968
5. Koecher, M.: Konvexe Kegel, lecture notes, Univ. München 1969