TY  - JOUR
AU  - A. A. Dezin
TI  - Spectral characteristics of general boundary-value problems for operator~$D^2$
JO  - Matematičeskie zametki
PY  - 1985
SP  - 249
EP  - 256
VL  - 37
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1985_37_2_a11/
LA  - ru
ID  - MZM_1985_37_2_a11
ER  -