REFERENCES
- Berman , S. D. , Bogdan , V. G. ( 1977 ). On the isomorphism of the real group algebras of the abelian groups (Russian) . Mat. Zametki 21 ( 2 ): 229 – 238 .
- Berman , S. D. , Mollov , T. Zh . ( 1981 ). Splitting of the basises and isomorphism of group rings of abelian groups (Russian) . Pliska, Stud. Math. Bulg. 2 : 6 – 22 .
- Bovdi , A. A. , Mihovski , S. V. ( 1971 ). Algebraic elements of crossed products . Colloquia Mathematica Societatis Janas Bolyai, 6 . Rings, Modules and Radicals . Hungary : Keszthely , pp. 103 – 116 .
- Dimitrova , J. M. ( 2002 ). On the nil ideals of crossed products . C. R. Acad. Bulg. Sci. 55 ( 9 ): 5 – 8 .
- Dimitrova , J. M. ( 2003 ). Nil ideals of crossed products . Comm. Algebra. 31 : 4445 – 4453 .
- Fuchs , L. ( 1977 ). Infinite Abelian Groups . Vol. 1 . (Russian) . Moscow : World Publishing House .
- Passman , D. S. ( 1977 ). The Algebraic Structure of Group Rings . New York : Wiley-Interscience .
- Passman , D. S. ( 1989 ). Infinite Crossed Products . San Diego : Acad. Press .
- Communicated by V. A. Artamonov.