TY  - JOUR
AU  - V. I. Blagodatskikh
TI  - The convexity of spheres of attainability
JO  - Differencialʹnye uravneniâ
PY  - 1972
SP  - 2149
EP  - 2155
VL  - 8
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1972_8_12_a3/
LA  - ru
ID  - DE_1972_8_12_a3
ER  -