TY  - JOUR
AU  - V. F. Lazutkin
TI  - Existence of a~continuum of closed invariant curves for a~convex billiard
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1972
VL  - 27
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1972_27_3_a13/
LA  - ru
ID  - RM_1972_27_3_a13
ER  -