TY  - JOUR
AU  - T. S. Trofimchuk
TI  - Controllability of systems that are not solvable with respect to the highest derivative
JO  - Diskretnyj analiz i issledovanie operacij
PY  - 1980
SP  - 74
EP  - 82
IS  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DA_1980_20_a6/
LA  - ru
ID  - DA_1980_20_a6
ER  -