TY  - JOUR
AU  - A. L. Teptin
TI  - On the question of the sign of the Green function
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 1542
EP  - 1547
VL  - 19
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_9_a9/
LA  - ru
ID  - DE_1983_19_9_a9
ER  -