TY  - JOUR
AU  - L. M. Kuks
TI  - A Sturm type comparison theorem for systems of fourth order ordinary differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1974
SP  - 751
EP  - 754
VL  - 10
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1974_10_4_a20/
LA  - ru
ID  - DE_1974_10_4_a20
ER  -