TY  - JOUR
AU  - V. P. Prokop'ev
TI  - The stability of the unperturbed motion in the critical case of two zero roots and a pair of pure imaginary roots
JO  - Differencialʹnye uravneniâ
PY  - 1976
SP  - 2009
EP  - 2013
VL  - 12
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1976_12_11_a10/
LA  - ru
ID  - DE_1976_12_11_a10
ER  -