TY  - JOUR
AU  - Polák, L.
TI  - Oscillation and nonoscillation criteria for two-dimensional systems of linear ordinary differential equations.
JO  - Georgian Mathematical Journal
PY  - 2004
SP  - 137
EP  - 154
VL  - 11
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/GMJ_2004__11_1_51354/
LA  - en
ID  - GMJ_2004__11_1_51354
ER  -