TY  - JOUR
AU  - Yu. B. Rudyak
TI  - On the fundamental group of a three-dimensional manifold
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 771
EP  - 774
VL  - 210
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_210_4_a5/
LA  - ru
ID  - DAN_1973_210_4_a5
ER  -