TY  - JOUR
AU  - H. Zieschang
TI  - On a problem of Neuwirth on knot groups
JO  - Doklady Akademii Nauk
PY  - 1963
SP  - 1017
EP  - 1019
VL  - 153
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1963_153_5_a7/
LA  - ru
ID  - DAN_1963_153_5_a7
ER  -