1. G. V. Dorofeev, ,“On the nilpotency of right-alternative rings,” Algebra i Logika,9, No. 3, 302–305 (1970).
2. G. V. Dorofeev, ,“On the locally nilpotent radical in nonassociative rings,” Algebra i Logika,10, No. 4, 355–364 (1971).
3. K. A. Zhevlakov, ,“Solvability and nilpotency of Jordan rings,” Algebra i Logika,5, No. 3, 37–58 (1966).
4. A. I. Shirshov, ,“On some nonassociative nil rings and alternative algebras,” Matem. Sb., 41(83), No. 3, 381–394 (1957).
5. N. J. Divinsky, Rings and Radicals, Univ. of Toronto Press, Toronto (1965).