TY  - JOUR
AU  - I. I. Endovickii
TI  - Certain sufficient conditions for instability of the solutions of second order linear differential equations
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1969
SP  - 58
EP  - 61
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1969_6_a6/
LA  - ru
ID  - IVM_1969_6_a6
ER  -