TY  - JOUR
AU  - I. N. Astafieva
TI  - Second solutions of equations with positive operators
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 1722
EP  - 1724
VL  - 6
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_9_a21/
LA  - ru
ID  - DE_1970_6_9_a21
ER  -