TY  - JOUR
AU  - A. S. Matveev
TI  - On the convexity of the images of quadratic mappings
JO  - Algebra i analiz
PY  - 1998
SP  - 159
EP  - 196
VL  - 10
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_1998_10_2_a6/
LA  - ru
ID  - AA_1998_10_2_a6
ER  -