TY  - JOUR
AU  - V. I. Feigin
TI  - Spectral asymptotic theory for boundary value problems, and the asymptotic behavior of the negative spectrum
JO  - Doklady Akademii Nauk
PY  - 1977
SP  - 1269
EP  - 1272
VL  - 232
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1977_232_6_a9/
LA  - ru
ID  - DAN_1977_232_6_a9
ER  -