TY  - JOUR
AU  - S. Todorinov
TI  - Directed groups
JO  - Algebra i logika
PY  - 1971
SP  - 558
EP  - 560
VL  - 10
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1971_10_5_a5/
LA  - ru
ID  - AL_1971_10_5_a5
ER  -