TY  - JOUR
AU  - V. V. Kozlov
TI  - On the instability of equilibrium in a~potential field
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1981
SP  - 256
EP  - 257
VL  - 36
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1981_36_3_a14/
LA  - en
ID  - RM_1981_36_3_a14
ER  -