TY  - JOUR
AU  - A. A. Agrachev
TI  - The Curvature and Hyperbolicity of Hamiltonian Systems
JO  - Informatics and Automation
PY  - 2007
SP  - 31
EP  - 53
VL  - 256
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_2007_256_a1/
LA  - ru
ID  - TRSPY_2007_256_a1
ER  -