TY  - JOUR
AU  - P. V. Nikolenko
TI  - On the structure of the pre-image of zero of a nonnegative solution of a homogeneous equation with a biharmonic principal part
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 1058
EP  - 1059
VL  - 25
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_6_a25/
LA  - ru
ID  - DE_1989_25_6_a25
ER  -