TY  - JOUR
AU  - V. A. Sadovnichii
AU  - A. Yu. Popov
TI  - An estimate for the best approximation of solutions of the Sturm--Liouville equation with an analytic potential by partial sums of asymptotic series
JO  - Differencialʹnye uravneniâ
PY  - 1999
SP  - 498
EP  - 506
VL  - 35
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1999_35_4_a7/
LA  - ru
ID  - DE_1999_35_4_a7
ER  -