TY  - JOUR
AU  - V. N. Tulovskii
TI  - Asymptotic distribution of eigenvalues of differential operators with variable coefficients
JO  - Doklady Akademii Nauk
PY  - 1972
SP  - 827
EP  - 830
VL  - 206
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1972_206_4_a13/
LA  - ru
ID  - DAN_1972_206_4_a13
ER  -