TY  - JOUR
AU  - S. M. Shugrin
TI  - Strong and weak extension of differential operators
JO  - Differencialʹnye uravneniâ
PY  - 1975
SP  - 2067
EP  - 2082
VL  - 11
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1975_11_11_a15/
LA  - ru
ID  - DE_1975_11_11_a15
ER  -