TY  - JOUR
AU  - V. S. Serov
TI  - The Friedrichs extension of a differential operator with a singularity
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 1422
EP  - 1429
VL  - 21
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_8_a16/
LA  - ru
ID  - DE_1985_21_8_a16
ER  -