TY  - JOUR
AU  - I. N. Sergeev
TI  - The rotation method and singular numbers of three-dimensional systems
JO  - Differencialʹnye uravneniâ
PY  - 1999
SP  - 1630
EP  - 1639
VL  - 35
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1999_35_12_a5/
LA  - ru
ID  - DE_1999_35_12_a5
ER  -