TY  - JOUR
AU  - G. A. Gurevich
TI  - On the ranks of coefficient-free equations in a free group
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 272
EP  - 274
VL  - 209
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_209_2_a2/
LA  - ru
ID  - DAN_1973_209_2_a2
ER  -