TY  - JOUR
AU  - Grigorian, Gevorg A.
TI  - Oscillatory and non-oscillatory criteria for linear four-dimensional Hamiltonian systems
JO  - Mathematica Bohemica
PY  - 2021
SP  - 289
EP  - 304
VL  - 146
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.2020.0149-19/
DO  - 10.21136/MB.2020.0149-19
LA  - en
ID  - 10_21136_MB_2020_0149_19
ER  -