TY  - JOUR
AU  - V. V. Ditkin
TI  - On the root subspaces of a two-parameter spectral problem
JO  - Doklady Akademii Nauk
PY  - 1992
SP  - 20
EP  - 23
VL  - 324
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1992_324_1_a2/
LA  - ru
ID  - DAN_1992_324_1_a2
ER  -