TY  - JOUR
AU  - V. A. Tkachenko
TI  - On conditions of discreteness of the spectrum of monomial differential operators
JO  - Differencialʹnye uravneniâ
PY  - 1966
SP  - 634
EP  - 639
VL  - 2
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1966_2_5_a6/
LA  - ru
ID  - DE_1966_2_5_a6
ER  -