TY  - JOUR
AU  - K. A. Shramov
TI  - Birational Rigidity and $\mathbb Q$-Factoriality of a Singular Double Cover of a Quadric  Branched over a Divisor of Degree~4
JO  - Matematičeskie zametki
PY  - 2008
SP  - 300
EP  - 311
VL  - 84
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2008_84_2_a10/
LA  - ru
ID  - MZM_2008_84_2_a10
ER  -