1. Braun, H., u.M. Koecher: Jordan-Algebren. Berlin-Heidelberg-New York: Springer 1966.
2. Bruck, R. H.: A survey of binary systems. Erg. Math. Berlin-Göttingen-Heidelberg: Springer 1958.
3. Helgason, S.: Differential geometry and symmetric spaces. New York-London: Academic Press 1962.
4. Kobayashi, S., andK. Nomizu: Foundations of differential geometry I. New York and London: Interscience Publ. 1963.
5. Koecher, M.: Jordan Algebras and their applications. University of Minnesota Lecture notes, Minneapolis 1962.