TY  - JOUR
AU  - Lomtatidze, A.
AU  - Partsvania, N.
TI  - Oscillation and nonoscillation criteria for two-dimensional systems of first-order linear ordinary differential equations.
JO  - Georgian mathematical journal
PY  - 1999
SP  - 285
EP  - 298
VL  - 6
IS  - 3
UR  - http://geodesic.mathdoc.fr/item/GMJ_1999__6_3_48320/
LA  - en
ID  - GMJ_1999__6_3_48320
ER  -