TY  - JOUR
AU  - I. N. Sergeev
TI  - Definition and properties of characteristic frequencies of a linear equation
JO  - Trudy Seminara im. I.G. Petrovskogo
PY  - 2006
SP  - 249
EP  - 294
VL  - 25
IS  - 25
UR  - http://geodesic.mathdoc.fr/item/TSP_2006_25_25_a10/
LA  - ru
ID  - TSP_2006_25_25_a10
ER  -