TY  - JOUR
AU  - В.Э. Лянце
TI  - A differential operator with spectral singularities. I
JO  - Matematičeskij sbornik
PY  - 1964
SP  - 521
EP  - 561
VL  - 106
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS_1964__106_4_a2/
LA  - en
ID  - MS_1964__106_4_a2
ER  -