TY  - JOUR
AU  - N. G. Bulgakov
TI  - On the question of the stability of the solutions of second order systems in critical cases
JO  - Differencialʹnye uravneniâ
PY  - 1978
SP  - 543
EP  - 545
VL  - 14
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1978_14_3_a18/
LA  - ru
ID  - DE_1978_14_3_a18
ER  -