1. Y.Al-Khamees, On the structure of finite completely primary rings. To appear in J. Fac. Sci., Riyad Uni.
2. C. W. Ayoub, On finite primary rings and their group of units. Compositio Math.21, 247?252 (1969).
3. C. Bond, On the group of automorphisms of finite completely primary rings. Ph. D. thesis, University of Reading, England 1978.
4. W. E. Clark, A coefficient ring for finite non-commutative rings. Proc. Amer. Math. Soc.33, 25?28 (1972).
5. B. Corbas, Finite rings in which the product of any two zero divisors is zero. Arch. Math.XXI, 466?469 (1970).