TY  - JOUR
AU  - O. Ya. Viro
TI  - Two-sheeted branched coverings of the three-dimensional sphere
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1973
SP  - 6
EP  - 39
VL  - 36
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1973_36_a1/
LA  - ru
ID  - ZNSL_1973_36_a1
ER  -