TY  - JOUR
AU  - G. T. Kozlov
AU  - A. I. Kokorin
TI  - An elementary theory of torsion-free abelian groups with a
JO  - Algebra i logika
PY  - 1969
SP  - 320
EP  - 334
VL  - 8
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1969_8_3_a3/
LA  - ru
ID  - AL_1969_8_3_a3
ER  -