TY  - JOUR
AU  - V. M. Bruk
TI  - On linear relations generated by nonnegative operator function and degenerate elliptic differential-operator expression
JO  - Žurnal matematičeskoj fiziki, analiza, geometrii
PY  - 2009
SP  - 123
EP  - 144
VL  - 5
IS  - 2
UR  - http://geodesic.mathdoc.fr/item/JMAG_2009_5_2_a1/
LA  - en
ID  - JMAG_2009_5_2_a1
ER  -