1. Divinsky, N.: Rings and radicals. Toronto: University of Toronto Press, 1965.
2. Jacobson, N.: Structure and representations of Jordan algebras. Amer. Math. Soc. Colloq. Publ. 34, Providence (1969).
3. Tsai, C.: Levitzki radical for Jordan rings. Proc. Amer. Math. Soc.24, 119?123 (1970).
4. Zhevlakov: Solvability and nilpotence of Jordan rings. Algebra i Logika Sem.5, 37?58 (1966).
5. Zwier, P.: Prime ideals in a class of narings, to appear.