TY  - JOUR
AU  - A. A. Agrachev
TI  - The topology of quadratic mappings and Hessians of smooth mappings
JO  - Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya 
PY  - 1988
SP  - 85
EP  - 124
VL  - 26
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/INTA_1988_26_a2/
LA  - ru
ID  - INTA_1988_26_a2
ER  -