TY  - JOUR
AU  - V. I. Plotnikov
TI  - An energy inequality and the overdeterminacy property of a system of eigenfunctions
JO  - Izvestiya. Mathematics 
PY  - 1968
SP  - 695
EP  - 707
VL  - 2
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1968_2_4_a1/
LA  - en
ID  - IM2_1968_2_4_a1
ER  -