TY  - JOUR
AU  - Grigorian, Gevorg Avagovich
TI  - Oscillatory and non oscillatory criteria for the systems of two linear first order two by two dimensional matrix ordinary differential equations
JO  - Archivum mathematicum
PY  - 2018
SP  - 189
EP  - 203
VL  - 54
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5817/AM2018-4-189/
DO  - 10.5817/AM2018-4-189
LA  - en
ID  - 10_5817_AM2018_4_189
ER  -