TY  - JOUR
AU  - A. S. Sumbatov
TI  - Nonextremality of families of curves defined by dynamic equations of nonholonomic Chaplygin systems
JO  - Differencialʹnye uravneniâ
PY  - 1984
SP  - 897
EP  - 899
VL  - 20
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1984_20_5_a25/
LA  - ru
ID  - DE_1984_20_5_a25
ER  -