TY  - JOUR
AU  - G. N. Zhevlakov
AU  - S. A. Pak
TI  - Conditions for the negativity of the Green's function of a Sturm--Liouville problem for a second order linear ordinary differential equation
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 1114
EP  - 1119
VL  - 5
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_6_a14/
LA  - ru
ID  - DE_1969_5_6_a14
ER  -