1. Rings of order p3;Antipkin;Sibirsk, Mat. Zh.,1982
2. Zum Klassifikationsproblem endlicher Ringe, Osterreich;Flor;Akad. Wiss. Math. -Natur. kl. Sitzungsber. II,1975
3. Associative rings of order p3;Gilmer;Proc. Japan Acad.,1973
4. Mutually nonisomorphic unitary Fp-algebras of order p4;Ion,1985
5. Nilpotent Rings;Kruse,1969