TY  - GEN
AU  - Cao, X.H. 
AU  - Liu, S.X./ Shum, K.P.
TI  - Rings, groups and algebras: vol.181
SN  - 0824797337
U1  - 512.02 
PY  - 1996///
CY  - New York
PB  - Marcel Dekker
KW  - ALGEBRA
ER  -