1. J. Faulkner, “Octonion Planes Defined by Quadratic Jordan Algebras,” Amer. Math. Soc. Memoirs, Providence, R. I.
2. Structure and Representations of Jordan Algebras;Jacobson,1968
3. Über eine Gruppe von rationaler Abbildungen;Koecher;Invent. Math.,1967
4. A general theory of Jordan rings;McCrimmon,1966
5. The radical of a Jordan algebra;McCrimmon,1969