TY  - JOUR
AU  - A. A. Fomin
TI  - Invariants and duality in some classes of torsion-free abelian
JO  - Algebra i logika
PY  - 1987
SP  - 63
EP  - 83
VL  - 26
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1987_26_1_a3/
LA  - ru
ID  - AL_1987_26_1_a3
ER  -